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Table 1 Checklist used for the assessment of clinimetric properties of the studies included in the review

From: Clinimetric evaluation of methods to measure muscle functioning in patients with non-specific neck pain: a systematic review

Clinimetric property

Definition

Criteria

Reproducibility

Degree to which repeated measurements in stable persons provide similar answers

K: nominal/ordinal data

ICC: ordinal/parametric data

Reliability

The extent to which patients can be distinguished from each other, despite measurement error

+ Adequate design, method; intraobserver ICC > 0.85 or K > 0.41; interobserver ICC >0.70 or K>0.61

± Information unclear or method doubtful

- Adequate design, method; intraobserver ICC < 0.85 or K < 0.40; interobserver ICC < 0.70 or K < 0.60

? No information found

Agreement

The ability to achieve the same value with repeated measurements

Limits of agreement, SEM or SDC are presented

+ Sufficient information, bias unlikely

± Information unclear or method doubtful

- Information sufficient, instrument did not meet criteria

? No information

Construct validity

The extent to which a test actually measures the concept or trait which is being measured

Pearson's R or Spearman Rho

+ Adequate design, method; r >0.65

± Information unclear or method doubtful

- Information sufficient, instrument did not meet criteria

? No information

Responsiveness

Ability of an instrument to detect important change over time in the concept being measured

Hypotheses were formulated and results are in agreement

+ Adequate design, method; intraobserver ICC > 0.85 or K > 0.41; interobserver ICC >0.70 or K>0.61

± Information unclear or method doubtful

- Adequate design, method; intraobserver ICC < 0.85 or K < 0.40; interobserver ICC < 0.70 or K < 0.60

? No information

Interpretability

The degree to which one can assign qualitative meaning to quantitative scores

Authors provided information on the interpretation of scores, MIC-defined Mean and SD scores before and after treatment

  1. * K = Kappa statistics; ICC = intraclass correlation coefficient, SEM = standard error of measurement, SDC = smallest detectable change, MIC = minimal important change, and SD = standard deviation