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

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

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