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Table 1 Outcome measures and potential predictors of response

From: Chronic pain self-management support with pain science education and exercise (COMMENCE): study protocol for a randomized controlled trial

Construct

Outcome measure

Scale range

Minimal important difference

Function

Short Musculoskeletal Function Assessment - Dysfunction Index (SMFA-DI)

34–170

10 pointsa

How much participants are bothered by difficulty with functional activities

Short Musculoskeletal Function Assessment - Bother Index (SMFA-BI)

12–60

5.5 pointsa

Pain intensity

Numeric Pain Rating Scale (NPRS)

0–10

2 points [86]

Fatigue

Numeric Fatigue Rating Scale (NFRS)

0–10

1.4 points [87]

Pain interference

PROMIS Pain Interference Item Bank - 8 items

8–40

5 pointsa

Depressive symptoms

Patient Health Questionnaire - 9 (PHQ-9)

0–27

5 points [88]

Catastrophic thinking

Pain Catastrophizing Scale (PCS)

0–52

38 % of scale [89]

Fear of symptom exacerbation

11-item Tampa Scale of Kinesiophobia (TSK-11)

11–44

5.6 points [90]

Pain neurophysiology knowledge

Neurophysiology of pain test (NPT)

0–13

1.1 pointsa

Self efficacy

Pain Self Efficacy Questionnaire (PSEQ)

0–60

11 points [91]

Work status

Working versus not-working

  
 

Working full hours versus modified hours

  
 

Working full duties versus previous duties

  

Healthcare utilization

# of health care visits during 12 weeks prior to treatment versus health care visits during 12-week follow-up period

  

Post-traumatic stress symptoms

Post-traumatic Stress Disorder Checklist

17–85

 

Sense of perceived injustice

Injustice Experience Questionnaire (IEQ)

0–48

 

Medication use

Number of medications

  
 

Medication by class

  

Comorbidities

Disease count

  

Cold sensitivity

A novel test of cold sensitivity

  

Pressure sensitivity

Pressure Pain Threshold (PPT)

  
  1. Legend: This table depicts each construct being measured as either an outcome or potential predictor of response, the measure used to evaluate that construct, the range of the scale (if applicable), and the minimal important difference for scales that will be measured as outcomes
  2. aIn the absence of an established MCID or MDC, change greater than half a standard deviation will be considered clinically meaningful [92]. In these instances, clinical data from Woodstock and Area Community Health Centre was used to establish the standard deviation