Spinal Control During Functional Activities to Improve Low Back Pain Outcomes

Chronic Low Back Pain Clinical Trial

— LBP  

Official title:

Spinal Control During Functional Activities to Improve Low Back Pain Outcomes

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02027623
• Other study ID #: 201205051
• Secondary ID: 2R01HD047709
• Status: Completed
• Phase: N/A
• Start date: January 15, 2014
• Est. completion date: November 2017

Study information

• Verified date: August 2020
• Source: Washington University School of Medicine
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Exercise is one of the primary interventions used with people with chronic, mechanical low back pain. It is unknown, however, which exercise is best for which person, which exercises a person will adhere to and for how long, and the effect of adhering to a specific type of exercise on how the person functions, particularly in the long run. The purpose of this study is to examine if the short- and long-term effects are different between 1) commonly prescribed strength and flexibility exercises for the trunk and limbs, and 2) individualized practice in daily functional activities that are difficult or painful to perform. Adherence to the different interventions, the relationship between adherence and outcomes,as well as the effect of a booster intervention also will be examined.

Description:

For many people, mechanical low back pain (LBP) is a long-term, function-limiting condition rather than a short-term, self-limiting condition. Exercise is one of the primary non-surgical approaches used worldwide for managing LBP. Specifically in people with chronic LBP, exercise has been found to be as efficacious, if not more efficacious than 1) no treatment, 2) usual care, and 3) many other treatments, such as massage or laser therapy. Despite the growing body of evidence for the beneficial effects of exercise, however, there is limited evidence about 1) which exercise is best for which person, 2) how long the effects of different exercises last, 3) which types of exercise people will adhere to, and for how long, and 4) the mechanisms underlying the effects of different types of exercise.

This study aims to address these limitations by directly comparing the effects of 1) exercise to increase strength of the trunk and increase flexibility of the trunk and extremities, and 2) individualized, motor skill training directed at performance of daily functional activities that are painful or limited due to the person's LBP. This study also will examine 1) the effects of a booster phase of intervention, 2) the relationship between adherence to intervention and function, and 3) the relationship between performance of functional activities and function-related outcomes. People with chronic LBP will be randomized to 1) an intervention of strength and flexibility exercise or motor skill training, and 2) a booster or no-booster intervention. Intervention will be provided in 2 phases: 1) initial phase: 6 - 1 hour sessions, once/week for 6 weeks, and 2) booster phase: # of sessions needed to regain independence in home program, beginning 6 months after the initial phase. The investigators will collect 1) measurements of pain, function, disability, and economic outcomes, 2) reports of adherence, and 3) laboratory-based measures of performance of functional activities. People will be followed for 12 months after the initial intervention phase. Three sets of hypotheses are proposed. First, the investigators hypothesize that both interventions will result in improvements in pain, function, disability, and economic outcomes, but that the motor skill training will result in more long lasting improvements than the strength and flexibility exercise. Second, the investigators hypothesize that the effect of a booster phase of intervention will 1) result in longer lasting improvement in function and better adherence than a no-booster intervention, and 2) be greater for motor skill training than for strength and flexibility exercise. Finally, the investigators hypothesize that 1) adherence to motor skill training will be more strongly related to function than will adherence to strength and flexibility exercise, and 2) performance of functional activities by people receiving motor skill training will be more strongly related to function than performance of functional activities by people receiving strength and flexibility exercise.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 154
• Est. completion date: November 2017
• Est. primary completion date: November 2017
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 60 Years

Eligibility

Inclusion Criteria:

• chronic low back pain for a minimum of 12 months

• currently experiencing low back pain symptoms but not in a recurrence or an acute flare-up

• Modified Oswestry Disability Index score of = 20%

• 3 or more functional activities limited due to low back pain

• able to stand and walk without assistance

• able to understand and sign a consent form

Exclusion Criteria:

• BMI >30

• any structural spinal deformity including scoliosis, kyphosis, or stenosis

• spinal fracture or dislocation

• low back pain due to trauma

• osteoporosis

• ankylosing spondylitis

• rheumatoid arthritis

• fibromyalgia

• symptomatic disc herniation

• spondylolisthesis

• serious spinal complications such as tumor or infection

• previous spinal surgery

• frank neurological loss, i.e., weakness and sensory loss

• pain or paresthesia below the knee

• etiology of low back pain other than the lumbar spine, e.g., hip joint

• history of neurologic disease which required hospitalization

• active treatment for cancer

• history of unresolved cancer

• pregnancy

• worker's compensation, disability, or litigation case

• Graves' disease

• Marfan syndrome

• Unable to classify low back pain based on clinical examination findings

Related Conditions & MeSH terms

• Back Pain
• Chronic Low Back Pain
• Low Back Pain
• Mechanical Low Back Pain

Intervention

Behavioral:
• Motor skill training
The participant will assist in selecting both simple and complex functional activities to practice. Difficulty will be graded to match the participant's motor capabilities. Three activities will be practiced per session. Within the practice of activities the training will emphasize 1) contraction of groups of specific trunk muscles, 2) earlier and greater movement of the hip, knee, and/or thoracic spine relative to the lumbar spine, 3) later and less movement of the lumbar spine relative to other regions. Within each activity the conditions of practice will vary based on 1) the participant's ability to perform the activity, and 2) the level of challenge the participant is faced with when performing the activity during his day. Equipment will be provided as needed.
• Strength and flexibility exercise
Exercises based on best evidence for effectiveness in people with chronic low back pain will be prescribed. Strengthening exercises will target all trunk muscles. Flexibility exercises will target all trunk and hip motions. All exercises will be performed at the intensity appropriate for the person's musculoskeletal fitness level based on the American College of Sports Medicine guidelines. Difficulty level, frequency, and number of repetitions will be modified based on guidelines described in the literature. Equipment will be provided as needed.

Locations

Country	Name	City	State
United States	Washington University School of Medicine	Saint Louis	Missouri

Sponsors (2)

Lead Sponsor	Collaborator
Washington University School of Medicine	Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Adherence to Home Program (0-100%) at Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to provide information about how often a participant performs his treatment as it was prescribed.; Procedure: Participants will use a VAS to indicate for each day the percentage of the treatment they were able to perform as prescribed. At each clinic visit the therapist will ask the participant to provide an estimate of the average percentage of the treatment he was able to perform as prescribed in the interval of time between 2 clinic visits.; Scoring: Average adherence is calculated by averaging the participants' daily adherence. Scores range from 0-100%. Higher values indicate higher adherence to treatment.	completion of initial 6 week intervention phase
Other	Adherence to Home Program (0-100%) at 6 Months After Completion of Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide information about how often a participant performs his treatment as it was prescribed.; Procedure: Participants will use a VAS to indicate an average percent adherence to performance of the treatment as prescribed over the past month.; Scoring: Value (percentage of treatment performed) provided by the participant on each monthly survey. Scores range from 0-100%. Higher values indicate higher adherence to treatment.	6 months after initial intervention phase
Other	Adherence to Home Program (0-100%) at 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide information about how often a participant performs his treatment as it was prescribed.; Procedure: Participants will use a VAS to indicate an average percent adherence to performance of the treatment as prescribed over the past month.; Scoring: Value (percentage of treatment performed) provided by the participant on each monthly survey. Scores range from 0-100%. Higher values indicate higher adherence to treatment.	12 months after initial intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Work Subscale Score (0-42 Points) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	Baseline, completion of initial 6 week intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Work Subscale Score (0-42 Points) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Work Subscale Score (0-42 Points) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	6 months after initial intervention phase, 12 months after initial intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Physical Activity Subscale Score (0-24 Points) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	Baseline, completion of initial 6 week intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Physical Activity Subscale Score (0-24 Points) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Other	Change in Fear-Avoidance Beliefs Questionnaire Physical Activity Subscale Score (0-24 Points) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess a participant's fear of pain and beliefs about how work and physical activity affect his LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Each question is ranked on a 7-point Likert scale (0-6). Higher scores indicate higher fear-avoidance. Two subscale scores are calculated. The physical activity subscale score (FABQ-PA) is the sum of questions 2, 3, 4, and 5 and ranges from 0-24. The work subscale score (FABQ-W) is the sum of items 6, 7, 9, 10, 11, 12, and 15 and ranges from 0-42.	6 months after initial intervention phase, 12 months after initial intervention phase
Other	Treatment Preference Assessment Measure, Effectiveness Subscale (0-4 Points)	Background/Purpose: This questionnaire is designed to provide information about a participant's treatment preferences and the participant's perceptions of four attributes of each treatment: effectiveness, acceptability, suitability/appropriateness, and convenience. The questionnaire is modified from a preference questionnaire designed by Sidani et al to reflect the treatments provided in the trial.; Procedure: The two treatment descriptions will be given in a random order to each participant.; Scoring: The four treatment attributes (effectiveness, acceptability, suitability/appropriateness, and convenience) will be rated on a 5-point Likert scale (0-4). The anchors are not at all (rating=0) and very much (rating=4).	Baseline
Other	Treatment Preference Assessment Measure, Acceptability Subscale (0-4 Points)	Background/Purpose: This questionnaire is designed to provide information about a participant's treatment preferences and the participant's perceptions of four attributes of each treatment: effectiveness, acceptability, suitability/appropriateness, and convenience. The questionnaire is modified from a preference questionnaire designed by Sidani et al to reflect the treatments provided in the trial.; Procedure: The two treatment descriptions will be given in a random order to each participant.; Scoring: The four treatment attributes (effectiveness, acceptability, suitability/appropriateness, and convenience) will be rated on a 5-point Likert scale (0-4). The anchors are not at all (rating=0) and very much (rating=4).	Baseline
Other	Treatment Preference Assessment Measure, Suitability/Appropriateness Subscale (0-4 Points)	Background/Purpose: This questionnaire is designed to provide information about a participant's treatment preferences and the participant's perceptions of four attributes of each treatment: effectiveness, acceptability, suitability/appropriateness, and convenience. The questionnaire is modified from a preference questionnaire designed by Sidani et al to reflect the treatments provided in the trial.; Procedure: The two treatment descriptions will be given in a random order to each participant.; Scoring: The four treatment attributes (effectiveness, acceptability, suitability/appropriateness, and convenience) will be rated on a 5-point Likert scale (0-4). The anchors are not at all (rating=0) and very much (rating=4).	Baseline
Other	Treatment Preference Assessment Measure, Convenience Subscale (0-4 Points)	Background/Purpose: This questionnaire is designed to provide information about a participant's treatment preferences and the participant's perceptions of four attributes of each treatment: effectiveness, acceptability, suitability/appropriateness, and convenience. The questionnaire is modified from a preference questionnaire designed by Sidani et al to reflect the treatments provided in the trial.; Procedure: The two treatment descriptions will be given in a random order to each participant.; Scoring: The four treatment attributes (effectiveness, acceptability, suitability/appropriateness, and convenience) will be rated on a 5-point Likert scale (0-4). The anchors are not at all (rating=0) and very much (rating=4).	Baseline
Other	Change in Direct and Indirect Health Care Costs (Estimated Costs) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: These are measures of costs associated with healthcare over the intervention phase. Procedure: Direct health costs will be estimates of the cost of (1) medication using average wholesale price and wholesale acquisition cost and (2) health services and medical equipment using the Medicare allowable cost. Indirect health costs will be estimated using absenteeism and presenteeism measures.	Baseline, completion of initial 6 week intervention phase
Other	Change in Direct and Indirect Healthcare Costs (Estimated Costs) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: These are measures of costs associated with healthcare from completion of the initial 6 week intervention phase to 6 months after the initial intervention phase.. Procedure: Direct health costs will be estimates of the cost of (1) medication using average wholesale price and wholesale acquisition cost and (2) health services and medical equipment using the Medicare allowable cost. Indirect health costs will be estimated using absenteeism and presenteeism measures.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Other	Change in Direct and Indirect Healthcare Costs (Estimated Costs) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: These are measures of costs associated with healthcare from 6 months after the initial intervention phase to 12 months after the initial intervention phase. Procedure: Direct health costs will be estimates of the cost of (1) medication using average wholesale price and wholesale acquisition cost and (2) health services and medical equipment using the Medicare allowable cost. Indirect health costs will be estimated using absenteeism and presenteeism measures.	6 months after initial intervention phase, 12 months after initial intervention phase
Primary	Change in Modified Oswestry Disability Questionnaire (0-100%) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: The 10-item Modified Oswestry Disability Questionnaire is a disease-specific measure that provides an index of a participant's perceived low back pain-related functional limitation.; Procedure: Participants will answer each of the 10 questions by placing a mark in the one box that best describes his current condition. Since a participant may feel that 2 of the statements describe his condition, he is instructed to mark only the box that most closely describes his current condition.; Scoring: Each item is given a value from 0-5. The total score is the sum of all questions divided by 50, multiplied by 100 to get a percent. 100 represents the highest level of limitation.	Baseline, completion of initial 6 week intervention phase
Primary	Change in Modified Oswestry Disability Questionnaire (0-100%) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: The 10-item Modified Oswestry Disability Questionnaire is a disease-specific measure that provides an index of a participant's perceived low back pain-related functional limitation.; Procedure: Participants will answer each of the 10 questions by placing a mark in the one box that best describes his current condition. Since a participant may feel that 2 of the statements describe his condition, he is instructed to mark only the box that most closely describes his current condition.; Scoring: Each item is given a value from 0-5. The total score is the sum of all questions divided by 50, multiplied by 100 to get a percent. 100 represents the highest level of limitation.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Primary	Change in Modified Oswestry Disability Questionnaire (0-100%) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: The 10-item Modified Oswestry Disability Questionnaire is a disease-specific measure that provides an index of a participant's perceived low back pain-related functional limitation.; Procedure: Participants will answer each of the 10 questions by placing a mark in the one box that best describes his current condition. Since a participant may feel that 2 of the statements describe his condition, he is instructed to mark only the box that most closely describes his current condition.; Scoring: Each item is given a value from 0-5. The total score is the sum of all questions divided by 50, multiplied by 100 to get a percent. 100 represents the highest level of limitation.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Numeric Pain Rating Scale (0-10) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to give the therapist information on the intensity of a participant's LBP symptoms.; Procedure: Participants will rate their LBP symptoms on a numeric scale of 0-10 where 0 represents no symptoms and 10 represents symptoms as bad as can be. They will rate their average symptoms over the prior 7 days, and worst symptoms over the prior 7 days.; Scoring: The score for each item is the rating the participant provides for each symptom category (average and worst).	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Numeric Pain Rating Scale (0-10) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to give the therapist information on the intensity of a participant's LBP symptoms.; Procedure: Participants will rate their LBP symptoms on a numeric scale of 0-10 where 0 represents no symptoms and 10 represents symptoms as bad as can be. They will rate their average symptoms over the prior 7 days, and worst symptoms over the prior 7 days.; Scoring: The score for each item is the rating the participant provides for each symptom category (average and worst).	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in Numeric Pain Rating Scale (0-10) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to give the therapist information on the intensity of a participant's LBP symptoms.; Procedure: Participants will rate their LBP symptoms on a numeric scale of 0-10 where 0 represents no symptoms and 10 represents symptoms as bad as can be. They will rate their average symptoms over the prior 7 days, and worst symptoms over the prior 7 days.; Scoring: The score for each item is the rating the participant provides for each symptom category (average and worst).	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Number of Acute Flare-ups of Low Back Pain (#) in Past 6 Months, From Baseline to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to give the therapist information about the history of a participant's LBP flare-ups in the past 6 months.; Definition: A flare-up is an increase in symptoms of at least 2 points on the NRS above a person's typical low back pain and lasts for at least 2 consecutive days Procedure: Participants will fill in information on how many acute flare-ups they have had over the past 6 months.; Scoring: The score will be the number the participant provides for the number of acute flare-ups over the last 6 months.	Baseline, 6 months after initial intervention phase
Secondary	Change in Number of Acute Flare-ups of Low Back Pain (#) in Past 6 Months, From 6 Months After the Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to give the therapist information about the history of a participant's LBP flare-ups in the past 6 months.; Definition: A flare-up is an increase in symptoms of at least 2 points on the NRS above a person's typical low back pain and lasts for at least 2 consecutive days Procedure: Participants will fill in information on how many acute flare-ups they have had over the past 6 months.; Scoring: The score will be the number the participant provides for the number of acute flare-ups over the last 6 months.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Current Medication Use for Low Back Pain (Number of Participants Currently Using Medication) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of medication for a participant's LBP.; Procedure: Participants will answer each question by marking if they are taking non-prescription medication and prescription medication for their LBP. Reported as number of participants currently using medication for LBP.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Current Medication Use for Low Back Pain (Number of Participants Currently Using Medication) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of medication for a participant's LBP.; Procedure: Participants will answer each question by marking if they are taking non-prescription medication and prescription medication for their LBP. Reported as number of participants currently using medication for LBP.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in Current Medication Use for Low Back Pain (Number of Participants Currently Using Medication) From 6 Months After Completion of Initial Intervention Phase to 12 Months After Completion of Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of medication for a participant's LBP.; Procedure: Participants will answer each question by marking if they are taking non-prescription medication and prescription medication for their LBP. Reported as number of participants currently using medication for LBP.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Absenteeism From Usual Activities Due to Low Back Pain (Number of Participants Who Report Absenteeism) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess the number of days a participant has been kept from his usual activities (work, school or housework) because of LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Reported as the number of participants who reported absenteeism from usual activities over the past 4 weeks.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Absenteeism From Usual Activities Due to Low Back Pain (Number of Participants Who Report Absenteeism) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess the number of days a participant has been kept from his usual activities (work, school or housework) because of LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Reported as the number of participants who reported absenteeism from usual activities over the past 4 weeks.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in Absenteeism From Usual Activities Due to Low Back Pain (Number of Participants Who Report Absenteeism) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess the number of days a participant has been kept from his usual activities (work, school or housework) because of LBP.; Procedure: Participants will answer each question by marking the answer as indicated.; Scoring: Reported as the number of participants who reported absenteeism from usual activities over the past 4 weeks.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Stanford Presenteeism Scale (Work Impairment Score: 10-50) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess how a participant's LBP affected his participation in usual activities and the impact of LBP on his ability to do his job over the past 4 weeks.; Scoring: A Work Impairment Score (WIS) is calculated as the sum of answers on the questions regarding how LBP has affected job ability over the past 4 weeks. Each of the WIS questions is ranked on a 5-point Likert scale. All scores are 1-5, with questions 2, 5, 6, 8, and 10 reverse scored (5-1). The score ranges from 10-50 with 50 indicating the highest degree of impairment.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Stanford Presenteeism Scale (Work Impairment Score: 10-50) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess how a participant's LBP affected his participation in usual activities and the impact of LBP on his ability to do his job over the past 4 weeks.; Scoring: A Work Impairment Score (WIS) is calculated as the sum of answers on the questions regarding how LBP has affected job ability over the past 4 weeks. Each of the WIS questions is ranked on a 5-point Likert scale. All scores are 1-5, with questions 2, 5, 6, 8, and 10 reverse scored (5-1). The score ranges from 10-50 with 50 indicating the highest degree of impairment.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in Stanford Presenteeism Scale (Work Impairment Score: 10-50) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess how a participant's LBP affected his participation in usual activities and the impact of LBP on his ability to do his job over the past 4 weeks.; Scoring: A Work Impairment Score (WIS) is calculated as the sum of answers on the questions regarding how LBP has affected job ability over the past 4 weeks. Each of the WIS questions is ranked on a 5-point Likert scale. All scores are 1-5, with questions 2, 5, 6, 8, and 10 reverse scored (5-1). The score ranges from 10-50 with 50 indicating the highest degree of impairment.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Physical Component Summary Score From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Physical Component Summary Score From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Physical Component Summary Score From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Mental Component Summary Score From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Mental Component Summary Score From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in 36-Item Short Form Health Survey (SF-36) Mental Component Summary Score From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to assess information about a participant's mental and physical health, and how well he is able to do his usual activities.; Procedure: Participants will answer each question by marking the answer as indicated. If participants are unsure how to answer a question, they are instructed to choose the best answer they can.; Scoring: Using a scoring application, the SF-36 provides 8 scales: a Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and a Mental Health score. The scores are combined to provide a Physical Component (PCS) and Mental Component (MCS) Summary score. For the PCS and the MCS, norm-based scores are scaled and normalized to have a mean of 50 and a standard deviation of 10 based on the 1998 population norms. Higher scores indicate better health.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Change in Use of Other Low Back Pain-related Treatments (Health Professional Care Seeking or Equipment Use (# of Participants)) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of additional treatments for a participant's LBP.; Health Professional Care Seeking Procedure: Participants will answer each question by marking yes or no for a list of other healthcare professionals they are seeing for treatment of their LBP.; Equipment Use Procedure: Participants will answer each question by marking yes or no for a list of equipment they are using to treat their LBP.; Scoring: Reported as the number of participants seeking care from health professionals for LBP or using equipment for LBP.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Use of Other Low Back Pain-related Treatments (Health Professional Care Seeking or Equipment Use (# of Participants)) From Completion of Initial 6 Week Intervention Phase to 6 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of additional treatments for a participant's LBP.; Health Professional Care Seeking Procedure: Participants will answer each question by marking yes or no for a list of other healthcare professionals they are seeing for treatment of their LBP.; Equipment Use Procedure: Participants will answer each question by marking yes or no for a list of equipment they are using to treat their LBP.; Scoring: Reported as the number of participants seeking care from health professionals for LBP or using equipment for LBP.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase
Secondary	Change in Use of Other Low Back Pain-related Treatments (Health Professional Care Seeking or Equipment Use (# of Participants)) From 6 Months After Initial Intervention Phase to 12 Months After Initial Intervention Phase	Background/Purpose: This questionnaire is designed to provide general information on the use of additional treatments for a participant's LBP.; Health Professional Care Seeking Procedure: Participants will answer each question by marking yes or no for a list of other healthcare professionals they are seeing for treatment of their LBP.; Equipment Use Procedure: Participants will answer each question by marking yes or no for a list of equipment they are using to treat their LBP.; Scoring: Reported as the number of participants seeking care from health professionals for LBP or using equipment for LBP.	6 months after initial intervention phase, 12 months after initial intervention phase
Secondary	Satisfaction With Care (15-75 Points)	Background/Purpose: This questionnaire assesses information about how satisfied a participant feels with the physical therapist and treatment he was provided.; Procedure: Participants will answer each question by marking the answer as indicated. They may only check off one answer per item.; Scoring: Each question is ranked on a 5-point Likert scale. All scores are 1-5, with questions 1, 3, 4, 8, 9, 10 and 13 reverse scored (5-1). The total score is the sum of all of the answers (15-75) with higher scores indicating more satisfaction with care.	Completion of initial 6 week intervention phase
Secondary	Change in Kinematics During Functional Activities (Degrees) From Baseline to Completion of Initial 6 Week Intervention Phase	Background/Purpose: These are laboratory measures of (1) movement of the lumbar region, hips and knees or (2) static alignment of the lumbar region during functional activities. Procedures: Angular data is quantified based on data from retro-reflective markers that are tracked with a 3-dimensional video system while the person performs an activity. Coordinate data from the video system is processed to provide quantification of movement or alignment. The variables of interest are (1) angular excursion in the first 50% of the descent phase for each region or joint during picking up an object and (2) lumbar curvature angle for preferred sitting. For movement, smaller numbers from baseline to post-treatment represent decreased movement of a region or joint. For alignment, larger negative numbers from baseline to post-treatment represent a more extended lumbar region alignment. Measures are obtained at baseline and immediately after a 6-week intervention phase.	Baseline, completion of initial 6 week intervention phase
Secondary	Change in Kinematics During Functional Activities (Degrees) From Completion of Initial 6 Week Intervention Phase to 6 Months After Intervention Phase	Background/Purpose: These are laboratory measures of (1) movement of the lumbar region, hips and knees or (2) static alignment of the lumbar region during functional activities. Procedures: Angular data is quantified based on data from retro-reflective markers that are tracked with a 3-dimensional video system while the person performs an activity. Coordinate data from the video system is processed to provide quantification of movement or alignment. The variables of interest are (1) angular excursion in the first 50% of the descent phase for each region or joint during picking up an object and (2) lumbar curvature angle for preferred sitting. For movement, smaller numbers from baseline to post-treatment represent decreased movement of a region or joint. For alignment, larger negative numbers from baseline to post-treatment represent a more extended lumbar region alignment. Measures are obtained after a 6 week intervention phase and 6 months after intervention.	Completion of initial 6 week intervention phase, 6 months after initial intervention phase