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Table 1 Reliability - Cronbach’s alpha and ICC

From: Reliability, validity and responsiveness of the German self-reported foot and ankle score (SEFAS) in patients with foot or ankle surgery

  Reliabilität Consistency
Test Mean t1 (SD) Retest Mean t2 (SD) Cronbach’s α t1 Cronbach’s α t2 ICC
SEFAS pain 52.05 (19.29) 52.69 (19.33) 0.858 0.870 0.973 (0.960;0.981)
  lof 47.13 (23.93) 48.54 (24.90) 0.747 0.790 0.954 (0.934;0.968)
  os 45.92 (27.57) 47.49 (29.48) 0.223 0.354 0.959 (0.941;0.972)
  total 48.37 (19.65) 49.68 (20.68) 0.881 0.889 0.970 (0.957;0.979)
  1. Reliability with test-retest reliability and internal consistency of the German SEFAS
  2. lof = limitation of function, o = others, ICC = interclass correlation coefficient, SD = standard deviation, t1 = first assessment, t2 = second assessment, CI = confidence interval