Psychometric properties of the 12-item WHODAS applied through phone survey: an experience in PERSIAN Traffic Cohort

Table 3 Factor loading matrix for WHODAS 2.0 items (N = 255)

Items (number of item)	Factor1	Factor2	Factor3	Factor4
Maintaining a friendship? (11)	0.9438
Dealing with people you do not know? (10)	0.9393
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? (4)	0.9266
How much have you been emotionally affected by your health problems? (5)	0.8671
Your day-to-day work/school? (12)	0.8224
Taking care of your household responsibilities? (2)	0.6231			−0.5900
Concentrating on doing something for ten minutes? (6)	0.4884			0.3985
Walking a long distance such as a kilometer [or equivalent]? (7)	0.5777	0.7656
Standing for long periods such as 30 min? (1)	0.6050	0.7171
Washing your whole body? (8)	0.6102		0.7529
Getting dressed? (9)	0.6140		0.7500
Learning a new task, for example, learning how to get to a new place? (3)	0.3865			0.8528
Eigen values	7.12	1.25	1.07	0.93
Cumulative variance (%)	0.59	0.69	0.78	0.86

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