Performance tests in people with chronic low back pain: responsiveness and minimal clinically important change

Spine
Eleonor I AnderssonRob J E M Smeets

Abstract

Cohort study. To assess the responsiveness and minimal clinically important change (MCIC) of 6 commonly-used performance tests (5-minute walking, 50-ft walking, sit-to-stand, 1 minute stair climbing, loaded forward reach, Progressive Isoinertial Lifting Evaluation). Performance tests are used to evaluate physical function in people with low back pain. Little is known about their clinimetric properties. Performance tests were administered in people with chronic nonspecific low back pain (n = 198) before and after 10 weeks of treatment. At 10 weeks, the global perceived effect scale was used to determine if participants judged themselves as worsened, unchanged, or improved. The mean change scores for each performance test were calculated. A performance test was considered responsive if the area under the receiver operating characteristic curve (AUC) was equal to or greater than 0.70. We used 2 methods to evaluate MCIC: the optimal cut-off point based on the receiver operating characteristic curve, which takes into account both sensitivity and specificity, and the minimal detectable change for improvement, which considers test specificity only. In general, the mean change scores were the smallest in participants who judged themsel...Continue Reading

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Citations

Feb 22, 2012·Journal of Strength and Conditioning Research·Helmi ChaabèneKarim Chamari
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