Table 2.

Distribution and reliability of the WHODAS 2.0 and the SF-36 for patients accepted for specialized rehabilitation in western Norway between January and June 2015

Domain	N	Mean (SD)	Observed range	Floor (0) score %	Ceiling (100) score %	Missing domain %	Cronbach’s α	Test–retest ICCa
WHODAS 2.0 [from 0 (best) to 100 (worst)]
Cognition	950	17.8 (18.8)	0–90.0	27.6	0.0	2.7	0.87	0.81
Mobility	962	33.8 (25.8)	0–100.0	13.8	0.7	1.5	0.85	0.84
Self-care	968	12.0 (17.6)	0–100.0	53.7	0.1	0.6	0.77	0.63
Getting along	966	24.8 (20.9)	0–100.0	17.2	0.1	2.7	0.75	0.79
Life activities	963	45.1 (27.3)	0–100.0	7.1	4.0	27.4	0.91	0.78
Life activities: household	963	44.8 (27.5)	0–100.0	10.0	4.9	0.8	0.87	0.78
Life activities: work/study	452	42.9 (31.8)	0–100.0	13.8	12.1	1.7	0.94	0.71b
Participation	952	41.1 (20.6)	0–100.0	2.1	0.1	3.1	0.83	0.75
Total score	970	30.9 (16.2)	0– 90.2	0.5	0.0	7.9	0.92	0.87
SF-36 [from 0 (worst) to 100 (best)]
Mental health	957	66.4 (19.3)	0–100.0	0.2	1.4	2.0	0.85
Vitality	965	33.4 (20.3)	0–100.0	5.8	0.3	2.1	0.82
Bodily pain	965	40.4 (25.8)	0–100.0	6.7	5.9	1.0	0.88
General health	945	48.6 (22.2)	0–100.0	0.7	0.4	2.8	0.76
Social functioning	969	55.4 (28.0)	0–100.0	5.1	10.4	2.0	0.85
Physical functioning	959	53.3 (25.5)	0–100.0	1.8	1.8	1.6	0.90
Role physical	940	16.6 (29.4)	0–100.0	67.8	6.7	3.8	0.80
Role emotional	930	44.1 (43.2)	0–100.0	41.1	31.9	4.5	0.85

WHODAS World Health Organization Disability Assessment Schedule, SF-36 Medical Outcomes Study 36-item Short Form Health Survey, SD standard deviation, ICC intra-class correlation

^aFor test–retest, there were 53 patients analysed in the study

^bFor Life activities: work/study, there were 21 patients analysed for ICC