Table 5:

Functional Status Measurement Instruments Used in Randomized Controlled Trials

Measurement Instrument	Descriptiona
5D Score	Generic health-related quality-of-life measure of 15 items measured with a 5-point Likert-type scale. Scores can range from 0 to 1; higher scores indicate fewer problems.
AIMS2: walking-bending subscale	Self-reported measure of physical function, comprising 5 items. Reported on a 0–100 scale where higher scores indicate more limited function.
ASES	Questionnaire for patients with osteoarthritis to assess self-efficacy. Comprising 20 questions across 3 subscales (pain, function, and other symptoms), each with scores ranging from 10 to 100 where higher scores indicate greater self-efficacy.
KOOS	Measure specific to knee function comprising 5 separate subscales (pain, other symptoms, activities of daily living, sport/recreation, and quality of life). Scores in each subsection range from 0 to 100 where higher scores indicate no knee-related problems.
Lysholm Knee Score	Questionnaire to evaluate knee function and symptoms during activity among patients with anterior cruciate ligament or meniscal injury. Based on 8 domains, scores range from 0 to 100 with higher scores indicating better outcomes.
	Hubbard (7) modified the questionnaire by removing the subsection on instability, making the maximum score 70.
MACTAR	Patient-specific questionnaire with scores ranging from 0 to 500 with higher scores indicating greater disability.
Physical Functioning Scale	Objective measure of the time in seconds for patients to walk 30 meters and climb up and down a flight of stairs with longer times indicating worse function developed by the study authors (8) for the purposes of their study as a means of an objective measure of function.
SF-36: Physical function subscale	Self-reported measure of function based on 10 items with scores ranging from 0 to 100; higher scores indicate better function.
Tegner Activity Scale	Questionnaire about patient-reported activity comprising questions related to both activities of daily living and sport. Each question score ranges from 0 to 10 where higher scores indicate more involvement with an activity.
WOMAC	Questionnaire to assess osteoarthritis of hip or knee. WOMAC is composed of 3 subscales (pain, stiffness, and function) and is available in 2 formats: 4-point Likert (scores range from 0 to 96) and 100-mm VAS (scores range from 0 to 2,400), where a higher score indicates more severe condition.
WOMET	Tool to evaluate health-related quality-of-life among patients with meniscal injury. 16 items are evaluated on a 100-mm VAS. Total scores range from 0 to 1,600 where higher scores indicate better function.

Abbreviations: AIMS2, Arthritis Impact Measurement Scale; ASES, Arthritis Self-Efficacy Scale; KOOS, Knee Injury and Osteoarthritis Outcome Score; MACTAR, McMaster–Toronto Arthritis Patient Preference Disability Questionnaire; SF-36, Short Form 36 health survey; VAS, visual analogue scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index; WOMET, Western Ontario Meniscal Evaluation Tool.

^aBased on information provided in the included studies.