Table 3 Forward selection conditional logistic regression model

Maternal mental illness

75 (51%)

132 (25%)

2.51 (1.55-4.05)

< 0.001

Maternal age 15-19 years old

31 (21%)

4 (0.6%)

2.45 (1.11-5.42)

0.027

Maternal age 20-24 years old

13 (9%)

28 (5%)

2.37 (1.38-4.06)

0.002

Maternal age 25-29 years old

41 (28%)

117 (22%)

1.00

0.236

Maternal age 30-34 years old

30 (20%)

197 (37%)

1.43 (0.81-2.53)

0.222

Maternal age 35-39 years old

30 (20%)

142 (26%)

2.90 (1.36-6.18)

0.006

Maternal age 40-44 years old

15 (10%)

39 (7%)

6.21 (2.50-15.4)

< 0.001

Maternal age 45-49 years old

14 (10%)

13 (2%)

24.4 (2.30-258)

0.008

SES quintile 1

15 (10%)

131 (23%)

1.00

-

SES quintile 2

18 (12%)

104 (19%)

2.41 (1.01-5.74)

0.047

SES quintile 3

32 (22%)

94 (17%)

2.83 (1.25-6.39)

0.012

SES quintile 4

41 (28%)

119 (22%)

3.40 (1.58-7.32)

0.002

SES quintile 5

41 (28%)

90 (17%)

7.14 (2.92-17.4)

< 0.001

Maternal drug misuse

7 (5%)

1 (0.2%)

28.8 (2.29-363)

0.009

Any non attendance at primary or secondary care

57 (39%)

101 (19%)

2.42 (1.42-4.14)

0.001

Child mental illness

34 (23%)

43 (8%)

2.65 (1.42-4.96)

0.002

Maternal contraception

41 (28%)

198 (37%)

0.52 (0.31-0.87)

0.013

Child admission to hospital

12 (8%)

12 (2%)

3.31 (1.21-9.02)

0.019