Variable

OR

95% C.I

p-value*

Number of siblings ≥ 5

4.5

0.5– 44.5

0.20

Gender

0.8

0.3 – 2.2

0.5

Mother’s occupational status

1.8

0.3 – 9.9

0.40

Mother’s educational status

0

0

0.009

Father’s occupational status

3.2

0.6 – 17.7

0.03

Father’s educational status

3.0

0.5 - 16.6

0.05