Risk factors

(reference categories)

Accidents

OR

95% CI

No (477)

Yes (23)

No.

%

No.

%

Drug abuse

-No (486)

-Yes (14)

466

11

95.9

78.6

20

3

4.1

1.4

6.35

1.65 - 24.58

Obesity

-No (469)

-Yes (31)

451

26

96.08

83.8

18

5

4.0

16.2

4.82

1.50 - 15.46

DM

-No (496)

-Yes (4)

474

3

95.4

75.0

22

1

4.6

25.0

7.18

0.33 - 76.8

Epilepsy

-No (497)

-Yes (3)

476

1

95.4

33.3

21

2

4.6

66.7

45.33

3.90 - 518.01

Occupation

-Graduates (253)

-Manual work (225)

-Jobless (22)

247

208

22

97.6

81.6

100.0

6

17

0

2.4

7.6

0.0

3.36

1.22 - 9.73

Social class

-Low (138)

-Middle (332)

-High (30)

130

320

27

94.2

96.4

90.0

8

12

3

5.8

3.6

10.0

0.61

1.81

0.23 - 1.67

0.35 - 8.21