Evidence for validity of the Swedish self-rated 36-item version of the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) in patients with mental disorders: a multi-centre cross-sectional study using Rasch analysis

Svanborg, Cecilia; Amer, Ahmed; Nordenskjöld, Axel; Ramklint, Mia; Söderberg, Per; Tungström, Stefan; Ginsberg, Ylva; Hermansson, Liselotte

doi:10.1186/s41687-022-00449-8

Journal of Patient-Reported Outcomes

Table 2 Fit statistics for the Swedish 36-item version of WHODAS 2.0

From: Evidence for validity of the Swedish self-rated 36-item version of the World Health Organization Disability Assessment Schedule 2.0 (WHODAS 2.0) in patients with mental disorders: a multi-centre cross-sectional study using Rasch analysis

Domain	Item	Item measure (logits)	n	S.E	Infit mean square	Outfit mean square	Point-biserial correlation
D1. Understanding and communicating
	1. Concentrating on doing something for ten minutes	− 0.07	780	0.04	0.91	0.87	0.67
	2. Remembering to do important things	0.1	780	0.04	0.92	0.91	0.67
	3. Analysing and finding solutions to problems in day-to-day life	− 0.02	780	0.04	0.83	0.79	0.72
	4. Learning a new task, for example, learning how to get to a new place	− 0.24	780	0.04	1.00	1.01	0.63
	5. Generally understanding what people say	− 0.84	780	0.05	1.01	0.93	0.58
	6. Starting and maintaining a conversation	− 0.23	780	0.04	1.02	1.01	0.62
D2. Getting around
	1. Standing for long periods such as 30 min	− 0.18	780	0.04	1.21	1.43	0.56
	2. Standing up from sitting down	− 1.05	780	0.05	1.04	1.09	0.54
	3. Moving around inside your home	− 1.38	780	0.05	0.92	0.77	0.56
	4. Getting out of your home	− 0.32	780	0.04	0.83	0.75	0.71
	5. Walking a long distance such as a kilometre [or equivalent]?	− 0.28	780	0.04	1.09	1.64	0.57
D3. Self-care
	1. Washing your whole body?	− 1.19	780	0.05	0.94	0.74	0.55
	2. Getting dressed?	− 0.8	780	0.06	0.87	0.66	0.55
	3. Eating	− 0.37	780	0.04	1.14	1.17	0.56
	4. Staying by yourself for a few days?	− 0.04	780	0.04	1.40	1.97	0.50
D4. Getting along with people
	1. Dealing with people you do not know?	− 0.11	780	0.04	0.95	0.91	0.66
	2. Maintaining a friendship?	− 0.07	780	0.04	0.91	0.90	0.68
	3. Getting along with people who are close to you?	− 0.48	780	0.05	0.98	0.96	0.61
	4. Making new friends?	0.5	780	0.04	1.16	1.21	0.64
	5. Sexual activities?	0.45	780	0.04	1.54	2.24	0.51
D5. Life activities
- Sub-domain 5a: domestic responsibilities
	1. Taking care of your household responsibilities?	0.09	780	0.04	0.82	0.77	0.73
	2. Doing most important household tasks well?	0	780	0.04	0.85	0.79	0.71
	3. Getting all the household work done that you needed to do?	0.43	780	0.04	0.88	0.87	0.72
	4. Getting your household work done as quickly as needed?	0.57	780	0.04	0.94	0.93	0.71
- Sub-domain 5b: leisure, work and school activities
	5. Your day-to-day work/school?	0.73	652	0.04	0.85	0.82	0.75
	6. Doing your most important work/school tasks well?	0.5	648	0.04	0.83	0.77	0.75
	7. Getting all the work done that you need to do?	0.61	648	0.04	0.89	0.83	0.74
	8. Getting your work done as quickly as needed?	0.61	648	0.04	0.90	0.83	0.74
D6. Participation in society
	1. How much of a problem did you have in joining in community activities (for example, festivities, religious or other activities) in the same way as anyone else can?	0.41	780	0.04	0.91	0.94	0.72
	2. How much of a problem did you have because of barriers or hindrances in the world around you?	− 0.21	780	0.04	1.08	1.00	0.60
	3. How much of a problem did you have living with dignity because of the attitudes and actions of others?	− 0.21	780	0.04	1.02	1.03	0.62
	4. How much time did you spend on your health condition, or its consequences?	0.73	780	0.04	1.46	1.57	0.48
	5. How much have you been emotionally affected by your health condition?	1.35	780	0.04	0.95	0.97	0.69
	6. How much has your health been a drain on the financial resources of you or your family?	0.33	780	0.04	1.21	1.22	0.62
	7. How much of a problem did your family have because of your health problems?	0.18	780	0.04	1.03	1.02	0.66
	8. How much of a problem did you have in doing things by yourself for relaxation or pleasure?	0.5	780	0.04	0.95	0.91	0.71

Items with misfit are in bold. (S.E. = standard error.)

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