Table 3

Demographic and socio-economic characteristics of subjects with BDI score ≥ 20

Variables
(BDI score ≥ 20) depressive symptoms



No
%
p-value

Gender


<0.001
female
461
65.85

male
239
34.15


Socio-economic class (score)


<0.001
high-class (19–25)
2
0.28

middle-class (12–18)
87
12.43

low-class (5–11)
611
87.29


Marital status


<0.01
single
274
39.15

married
235
33.57

others
193
27.58


Educational level


<0.001
illiterate/elementary school
136
19.42

guidance/high-school
266
38

diploma/associate degrees
258
36.86

bachelor/higher
40
5.72


Age (yrs)


<0.001
15–30
388
55.42

31–39
119
17

over 40
193
27.58


Modabernia et al. Clinical Practice and Epidemiology in Mental Health 2008 4:20   doi:10.1186/1745-0179-4-20