Effects Job Rotation in the Prevention of Work Related Musculoskeletal Disorders

Musculoskeletal Diseases Clinical Trial

— Jobrotation  

Official title:

Effects Job Rotation in the Prevention of Work Related Musculoskeletal Disorders: Cluster Randomized Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01979731
• Other study ID #: 18170313500000064
• Status: Completed
• Phase: N/A
• First received: October 17, 2013
• Last updated: February 23, 2016
• Start date: September 2013
• Est. completion date: February 2016

Study information

• Verified date: February 2016
• Source: Universidade Cidade de Sao Paulo
• Contact: n/a
• Is FDA regulated: No
• Health authority: Brazil: Ethics CommitteeBrazil: National Committee of Ethics in Research
• Study type: Interventional

Clinical Trial Summary

The objective this study is evaluated if job rotation (change works that function every to work hours)contributes to reduce absence from work to complaints musculoskeletal disorders. And:

• Improve general health status

• Improve musculoskelettal symptoms

• Improve work performance

• Decrease costs with absence

Description:

This study is single-blinded RCT, whose aim is to evaluate the effect of the rotation function in the prevention of musculoskeletal disorders in industrial workers Methods: Participants will be recruited from employees a textile industry. The inclusion criteria are: employees age between 18 and 65 years and be able to read and understand the questionnaires. The number of working hours lost due to leave for sick leave due to illness of the musculoskeletal system and connective tissue (M Group International Classification of Diseases, ICD-10) is used to estimate the sample size. The average time lost during the last three months, in companies where the study was conducted is approximately 1,100 hours. Assume that interventions will enable a reduction of this number by 10%, ie, the groups will have a difference of 100 lost working hours, with a standard deviation of 250 hours. Will be considered a statistical power of 80%, α=0.05 and a follow-up loss of up to 15%. Thus, 116 workers are required per group. The productive sectors included in the study will be pre- stratified from the level of exposure to ergonomic risk factors. The sectors with similar demands will be grouped and randomly divided between the intervention group and the control group. The intervention group will perform rotation function, switching between tasks with low, moderate and high ergonomic risk and different requests for ergonomic body region added to ergonomic guidelines. The control group will receive only the ergonomic guidelines. Primary outcomes: Absence from work due to sick leave due to disease of the musculoskeletal system and connective tissue. Secondary outcomes are: musculoskeletal symptoms (Nordic Questionnaire and EVA), ergonomic risk factors (Quick exposure Check and Job Factors Questionnaire), psychosocial factors and fatigue (Need for Recovery Scale (NFR), general health status (WHOQOL-bref), physical activity level (Baecke Questionnaire), productivity with Work Performance Questionnaire (HPQ) and costs (incremental cost effectiveness ratio). Outcomes will be assessed at baseline and after 3 , 6 and 12 months . The information on the amount of hours lost by removal for medical leave will be recorded daily. Expected results: It is expected that interventions to reduce the occurrence of musculoskeletal disorders and consequent worker absenteeism due to sick leave, 100 hours of work lost. It is expected that the results obtained in this study may contribute to setting standards in the field of Occupational Health, as well as for decision making of professionals working in this area.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 116
• Est. completion date: February 2016
• Est. primary completion date: February 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years to 65 Years

Eligibility

Inclusion Criteria:

• Sectors workers with production lines that allow switching between different tasks and requests biomechanical exposure levels ergonomic risk. And work is carried out in production cells.

Exclusion Criteria:

• Sector workers whose production lines are automated or semi-automated, possessing the pace of work determined by machinery and that the work stoppage is not possible.

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Investigator), Primary Purpose: Prevention

Related Conditions & MeSH terms

• Musculoskeletal Diseases

Intervention

Other:
• Job rotation
The intervention group will perform rotation function, switching between tasks with low, moderate and high ergonomic risk and different requests for ergonomic body region added to ergonomic guidelines.
• Guidelines ergonomics
Orientation about manual material handling, posture, furniture, rest break and others in general.

Locations

Country	Name	City	State
Brazil	Rosimeire Simprini Padula	Atibaia	SP

Sponsors (2)

Lead Sponsor	Collaborator
Universidade Cidade de Sao Paulo	Maria Luiza Caires Comper

Country where clinical trial is conducted

Brazil, 

References & Publications (1)

Comper ML, Padula RS. The effectiveness of job rotation to prevent work-related musculoskeletal disorders: protocol of a cluster randomized clinical trial. BMC Musculoskelet Disord. 2014 May 22;15:170. doi: 10.1186/1471-2474-15-170. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Change Geral Health Condictions	Psychosocial factors and fatigue (Need for Recovery Scale (NFR), general health status (WHOQOL-bref), physical activity level (Baecke Questionnaire)	After 6 months	Yes
Other	Reduced Cost effectiveness	Productivity (Work Performance Questionnaire (HPQ) and costs (incremental cost effectiveness ratio).	After 6 months	Yes
Primary	Decrease musculoskeletal absence from work.	Absence from work due to sick leave due to disease of the musculoskeletal system and connective tissue	After 6 months	No
Secondary	Decrease Musculoskeletal symptoms	Musculoskeletal symptoms (Nordic Questionnaire1 and EVA)	After 6 months	No

External Links

•   Paper Protocol