Table 3 The floor/ceiling effects, test–retest reliability, measurement error and responsiveness of CAIT-C.

From: Development of a valid Chinese version of the Cumberland Ankle Instability Tool in Chinese-speaking patients with chronic ankle instability disorders

 

Current study

Dutch version

Persian version

Korean version

Portuguese version

Spanish version

Original version

Floor effecta

1.5%

1%

2.6%

–

0%

0%

–

Ceiling effecta

3.8%

2%

5.1%

–

7.9%

9%

–

ICC (CI range)

0.930 (0.901–0.951)

0.943 (–)

0.91–0.95 (0.80–0.97)

0.94 (–)

0.95 (0.93–0.97)

0.95–0.98 (0.93–0.99)

0.96 (–)

SEM

1.73

0.82

2.03–2.40

1.72

–

–

–

MDC (I)b

4.80

2.28

5.6–6.5

–

–

–

–

MDC (G)c

0.44

0.04

–

–

–

–

–

ES

1.316

–

–

 

0.75

0.69–1.07

–

SRM

1.418

–

–

 

–

–

–

  1. CAIT-C Chinese version of Cumberland Ankle Instability Tool, ICC intraclass correlation coefficient, CI confidence interval, SEM standard error of measurement, MDC minimal detectable change, ES effect size, SRM standardized response mean.
  2. aPercentage of patients with the worst (floor effect) and the best (ceiling effect) score.
  3. bThe MDC value at an individual level.
  4. cThe MDC value at the group level.
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