Characteristics

Case group
N= 200

Control group
N= 200

P value

No

%

No

%

Age (years):
<20
20 – 40
> 40

10
172
18

5.2
85.8
9.0

15
170
15

7.4
85.3
7.3

0.80

Marital status:
Single
Married
Divorced

16
167
17

8.0
83.5
8.5

15
179
6

7.2
89.5
3.3

0.01

Educational level:
Illiterate
Less than University
University and higher

53
117
30

26.4
58.8
14.8

29
117
54

14.2
56.3
29.5

< 0.0001

Occupation:
House wives
Students
unskilled workers
Employee

96
20
48
36

48.0
10.0
24.0
18.0

86
16
54
44

43.0
8.0
27.0
22.0

0.20

Residence
Urban
Rural

92
108

46.2
53.8

146
54

73.2
26.8

0.001