Measurement Properties of the Quebec Back Pain Disability Scale in Patients With Nonspecific Low Back Pain: Systematic Review

Figures

Appendix.

Quebec Back Pain Disability Scale (Kopec et al^16,17)^a

Figure.

Flowchart of search and selection. QBPDS=Quebec Back Pain Disability Questionnaire.

Table 2.

Quality Criteria for Measurement Properties (Based on Terwee et al⁴⁸)^{^a}

↵^a MIC=minimal important change, SDC=smallest detectable change, LOA=limits of agreement, ICC=intraclass correlation coefficient, DIF=differential item functioning, AUC=area under the curve.
^b +=positive rating, ?=indeterminate rating, −=negative rating.

Table 1.

Levels of Evidence for Summary Statements on Measurement Property Based on Overall Quality⁵⁹

Table 5.

Data Synthesis⁴⁸: Levels of Evidence of Overall Quality of the QBPDS Measurement Properties per Language^{^a}

↵^a +++ or −−−=strong evidence of positive/negative result, ++ or −−=moderate evidence of positive/negative result, + or −=limited evidence of positive/negative result, +/−=conflicting evidence, ?=result indeterminate or unknown due to poor methodological quality, ?*=result unknown due to lacking information about the minimal important change, na=no information available, QBPDS=Quebec Back Pain Disability Questionnaire, RMDQ=Roland-Morris Disability Questionnaire, ODI=Oswestry Low Back Pain Disability Index, VAS=visual analog scale, NRPS=Numeric Rating Pain Scale.

Table 3.

Characteristics of Included Studies^{^a}

↵^a LBP=low back pain, UG=unchanged group, IG=improved group, FG=first group, SG=second group, N=included population, IQR=interquartile range.
^b One study, evaluating the measurement properties of the Quebec Back Pain Disability Scale, resulted in 2 publications and, therefore, is mentioned once.

Table 4.

Methodological Quality of Each Study per Measurement Property (COSMIN^{^a} Checklist³⁶)

↵^a COSMIN=COnsensus-based Standards for the selection of health Measurement InStruments.
^b One study, evaluating the measurement properties of the Quebec Back Pain Disability Scale, resulted in 2 publications and, therefore, is mentioned once.

Files in this Data Supplement:

eAppendixes (PDF) (31 KB) - This PDF contains the following supplements:
- eAppendix 1. Search Strategy
- eAppendix 2. Measurement Properties of the QBPDS From Studies of at Least Fair Methodological Quality Used to Determine the Level of Evidence