The 12-item World Health Organization Disability Assessment Schedule II (WHO-DAS II): a nonparametric item response analysis

Table 1 Characteristics of the study sample (n = 3615)

Sociodemographic variables
*Gender %*
Male	32.67
Female	67.33
*Age, M (SD)*	50.01 (13.89)
*Marital status %*
Married	54.67
Living with a partner	9.48
Single	11.76
Separated/divorced	12.91
Widowed	11.18
*Education level %*
Did not graduate from primary school	21.44
Primary school	15.12
Secondary school	43.14
University	20.30
*Work status %*
Student	1.31
Homemaker	23.36
Paid employment	57.70
Paid employment but in sick leave	39.52
Unemployed	2.34
Permanent disability	1.78
Retired/pensioner	13.37
Others	0.14

ISSN: 1471-2288