Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Pain Assessment |
Pain measurement using a Visual Analog Pain Scale by placing an X in the box to indicate the severity of pain from no pain to intolerable pain. The X in the box translates to a score of zero for no pain and increases by an additional 0.5 up to a high score of 10 which would be intolerable pain. |
Baseline, 12 months |
|
Primary |
Neuropathy Symptoms and Change (NSC) Score |
Validated questionnaire that evaluates change in neuropathy symptoms, including symptoms of weakness, sensory symptoms, and autonomic symptoms. Answers to questionnaire are yes/no and if yes, then degree of severity is evaluated with a plus one(slight), plus two (moderate) and plus three (severe). Questionnaire screens the presence and severity of diabetic peripheral neuropathy. Change in severity of symptoms are compared over time. Total scores range from 0 - 114, lower scores reflect no neuropathy symptoms, higher scores reflect more neuropathy symptoms. |
baseline, 12 months |
|
Primary |
Oswestry Disability Index |
Questionnaire examines perceived level of disability in 10 everyday activities of daily living including pain intensity, personal care, lifting, walking, sitting, standing, sleeping, sex life, social life and traveling. The 6 statements are scored from 0 to 5 scale, zero meaning no disability. The final score ranges from 0-100 with a score of 0-20 equals minimal disability, 21-40 equals moderate disability, 41-60 equals severe disability, 61-80 equals crippled and 81-100 equals bed-bound. |
Baseline, 12 months |
|
Primary |
Neuropathy Impairment Score (NIS) |
Subject's scores neuropathic deficits using a scale of 0-4 (zero=normal, 4=paralysis) to measure muscle weakness. The NIS score is a measure of neurologic impairment. The NIS Score has a range of 0 to 244. Lower scores indicate higher function, higher scores indicate lower function. |
Baseline, 12 months |
|
Primary |
Lower Limb Function Test |
Test for lower limb function in which the subject will need to walk on toes, walk on heels, and arise from kneeled position, each test is marked as not applicable, normal or abnormal. The examination assesses each component for the left and right side separately. If the test is normal, it is given a score of 0, and if it is abnormal, a score of 1. Not applicable scores a zero. Total scores range 0-6. Therefore, the maximum score of 6 indicates abnormality in all 3 components bilaterally and a minimum score of 0 indicates a normal result for all 3 components bilaterally. |
Baseline, 12 months |
|
Primary |
Modified Leads Assessment of Neuropathic Symptoms and Signs |
Questionnaire to identify and analyze pain by answering yes/no which translates to scores from 0-24. A score of 12 or more suggests pain of predominantly neuropathic origin. |
baseline, 12 months |
|
Primary |
Positive Pain |
Numeric Rating Scale used to assess pain from a scale of 0 (no pain) to 10 (worst possible pain) |
baseline, 12 months |
|
Secondary |
Patient Health Questionnaire |
Screens for the presence and severity of depression with 9 questions in a scale of 0-3. Zero=not at all, 1=several days, 2=more than half the days, 3=nearly every day. Total score range 0 - 27. A total score of 0-4=minimal depression, 5-9=mild depression, 10-14=moderate depression, 15-19=moderately severe depression, 20-27=severe depression |
Baseline, 12 months |
|
Secondary |
Height |
Subjects calculated height in centimeters. |
Baseline, 12 months |
|
Secondary |
Weight |
Subjects calculated weight in kilograms |
Baseline, 12 months |
|
Secondary |
Body Mass Index (BMI) |
Subject's BMI calculated as weight in kilograms divided by height in meters squared. Uses measurements of height and weight obtained during study (with appropriate metric conversions) |
Baseline, 12 months |
|
Secondary |
Hemoglobin A1c |
Hemoglobin is a protein within red blood cells. As glucose enters the bloodstream, it binds to hemoglobin, or glycates. The more glucose that enters the bloodstream, the higher the amount of glycated hemoglobin. An A1C level below 5.7 percent is considered normal. Reported as percentage of glycated hemoglobin |
Baseline, 12 months |
|
Secondary |
Forearm Sweat Volume Quantitative Axon Reflex Sweat Test (Q-SWEAT) |
Test that measures the rate and volume of sweat to determine the severity and pattern of autonomic disorders. As measured by µL/cm² |
baseline, 12 months |
|
Secondary |
Proximal Leg Laser Doppler Flowmetry (LDF) |
Laser Doppler velocimetry is used in hemodynamics research as a technique to partially quantify blood flow in human tissues such as skin. Within the clinical environment, the technology is often referred to as laser Doppler flowmetry (LDF). As measured in perfusion units (p.u.) |
Baseline, 12 months |
|
Secondary |
Extensor Digitorum Brevis Muscle Nerve Conduction |
A nerve conduction study (NCS) is a medical diagnostic test commonly used to evaluate the function, especially the ability of electrical conduction, of the motor and sensory nerves of the human body. As measured by amplitude (AMP) milliamp (mA) |
Baseline, 12 months |
|