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Table 2 Threshold values of the MDC95 and clinically important difference (CID) of the SS-QOL subscales

From: Assessing the Stroke-Specific Quality of Life for Outcome Measurement in Stroke Rehabilitation: Minimal Detectable Change and Clinically Important Difference

Subscale Score range ICC (95% CI) MDC95 (% scale width) Distribution-based CID Anchor-based CID
(% scale width)
     0.5 SD (% scale width) 1 SEM (% scale width)  
Mobility 6-30 0.84 (0.63, 0.93) 5.9 (24.6%) 2.4 (10%) 1.7 (7.1%) 1.5 (6.3%)
Self-care 5-25 0.88 (0.73, 0.95) 4.0(20.0%) 1.9 (9.5%) 1.2 (6.0%) 1.3 (6.5%)
UE function 5-25 0.88 (0.72, 0.95) 5.3(26.5%) 1.8 (9.0%) 1.3 (6.5%) 1.2 (6.0%)
  1. Abbreviations: CI, confidence interval; ICC, intraclass correlation coefficient; MDC95, minimal detectable change at 95% confidence; SD, standard deviation; SEM, standard error of measurement; UE, upper extremity.