Quebec Back Pain Disability Scale (QBPDS)
The Quebec Back Pain Disability Scale (QBPDS) measures the extent to which people with low back pain have difficulty with everyday activities. The questionnaire is composed of 20 items on daily activities. The items were selected from 6 relevant subdomains of functional skills for patients with low back pain.
Validity and Reliability
The English, French, Hungarian, and European Portuguese language versions of the QBPDS showed moderate support for positive internal consistency (Cronbach 0.89–0.96), but the Greek and Turkish language versions showed very little evidence for such consistency. The test-retest reliability ICCs were in the range of 0.70 to 0.99. The relative ICCs for inter-rater and intra-rater reliability were 0.96 and 0.93.
There is moderate evidence for positive construct validity for the English language version related to the SF-36. The QBPDS and VAS-pain showed correlations ranging from 0.37 to 0.87 (Speksnijder et al. 2016).
Scoring and Interpretation
The scale consists of 20 everyday activities and one basic question: “Do you have problems today with…?” Each activity is scored on a Likert scale from 0 to 5 (0 = not difficult at all, and 5 = unable to do). The total of all the individual scores can range from 0 to 100 and determines the final score. A higher score denotes a more severe level of disability. According to research, in order to state that a real change has happened in people with back pain, there must be a change of between 15 and 20 points between measurements.
QBPDS Online Calculator
Speksnijder CM, Koppenaal T, Knottnerus JA, Spigt M, Staal JB, Terwee CB. Measurement Properties of the Quebec Back Pain Disability Scale in Patients With Nonspecific Low Back Pain: Systematic Review. Phys Ther. 2016;96(11):1816-1831.
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