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

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

Questionnaires	Pretreatment			Posttreatment			Change scores Mean (SD)	t ^a	p-value
Questionnaires	Mean (SD)	% Floor	% Ceiling	Mean (SD)	% Floor	% Ceiling	Change scores Mean (SD)	t ^a	p-value
WOMAC
Pain	61.40 (18.86)	0.0	2.6	49.20 (20.93)	1.3	0.9	−12.20 (23.06)	8.06	< 0.001
Stiffness	57.16 (21.92)	0.9	5.6	46.01 (22.77)	2.6	2.2	−11.15 (27.87)	6.09	< 0.001
Function	49.78 (19.24)	0.0	0.4	41.06 (21.76)	0.0	0.0	−8.72 (21.56)	6.16	< 0.001
Total score	52.82 (17.87)	0.0	0.4	43.22 (20.41)	0.0	0.0	−9.60 (20.37)	7.18	< 0.001
WHODAS 2.0
Cognition	34.90 (26.87)	19.0	4.3	35.83 (29.91)	20.3	7.3	0.93 (32.96)	−0.43	0.669
Mobility	57.74 (28.81)	5.6	12.5	50.27 (29.20)	7.8	9.9	−7.47 (30.89)	3.68	< 0.001
Self-care	46.42 (29.94)	12.5	7.8	37.02 (27.99)	14.7	4.3	−9.40 (32.53)	4.40	< 0.001
Getting along	32.51 (30.32)	30.2	7.3	25.16 (26.10)	37.1	1.7	−7.35 (33.71)	3.32	0.001
Life activities	49.02 (28.61)	9.9	6.9	42.51 (29.10)	13.4	5.6	−6.51 (31.11)	3.19	0.002
Participation in society	51.31 (25.88)	2.2	2.6	45.42 (27.89)	8.2	3.9	−5.89 (29.21)	3.07	0.002
Total score	45.32 (21.80)	0.9	0.0	39.37 (22.61)	2.6	0.0	−5.95 (22.00)	4.12	< 0.001

SD standard deviation, WOMAC Western Ontario and McMaster Universities Osteoarthritis index, WHODAS 2.0 World Health Organization Disability Assessment Schedule 2.0 (12-item)
^a Paired t-test was used to compare the scores between pre- and posttreatment

ISSN: 1471-2474