Table 1 Demographic characteristics of cases and controls

Sex:

Male

62.7

61.8

0.84^a

Female

37.3

38.2

Education:

Illiterate

3.6

5

0.87^a

Lower than diploma level

48.2

49.5

Diploma

39.5

35.5

Higher than diploma

86

10

Paternal age at parturition (mean ± SD)

30.5 ± 6.2

26.4 ± 5.6

0.001^b

Maternal age at parturition (mean ± SD)

25 ± 4.5

26.1 ± 5.4

0.02^c

Familial history of major psychiatric disorder:

Yes

45(20.5%)

29(13.2%)

0.041^a

No

155(79.5%)

171(86.8%)

Birth rank

1

48 (21.8)

61 (27.7)

0.037^b

2

95 (43.2)

106 (48.2)

≥3

77 (35%)

53 (24.1)