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Table 2 Comparison of the mean (SD) scores and floor and ceiling effects of pre- and posttreatment for each questionnaire (n = 232)

From: Comparison of the responsiveness of the WOMAC and the 12-item WHODAS 2.0 in patients with Kashin–Beck disease

QuestionnairesPretreatmentPosttreatmentChange scores
Mean (SD)
t ap-value
Mean (SD)% Floor% CeilingMean (SD)% Floor% Ceiling
WOMAC
 Pain61.40 (18.86)0.02.649.20 (20.93)1.30.9−12.20 (23.06)8.06< 0.001
 Stiffness57.16 (21.92)0.95.646.01 (22.77)2.62.2−11.15 (27.87)6.09< 0.001
 Function49.78 (19.24)0.00.441.06 (21.76)0.00.0−8.72 (21.56)6.16< 0.001
 Total score52.82 (17.87)0.00.443.22 (20.41)0.00.0−9.60 (20.37)7.18< 0.001
WHODAS 2.0
 Cognition34.90 (26.87)19.04.335.83 (29.91)20.37.30.93 (32.96)−0.430.669
 Mobility57.74 (28.81)5.612.550.27 (29.20)7.89.9−7.47 (30.89)3.68< 0.001
 Self-care46.42 (29.94)12.57.837.02 (27.99)14.74.3−9.40 (32.53)4.40< 0.001
 Getting along32.51 (30.32)30.27.325.16 (26.10)37.11.7−7.35 (33.71)3.320.001
 Life activities49.02 (28.61)9.96.942.51 (29.10)13.45.6−6.51 (31.11)3.190.002
 Participation in society51.31 (25.88)2.22.645.42 (27.89)8.23.9−5.89 (29.21)3.070.002
 Total score45.32 (21.80)0.90.039.37 (22.61)2.60.0−5.95 (22.00)4.12< 0.001
  1. SD standard deviation, WOMAC Western Ontario and McMaster Universities Osteoarthritis index, WHODAS 2.0 World Health Organization Disability Assessment Schedule 2.0 (12-item)
  2. a Paired t-test was used to compare the scores between pre- and posttreatment