Table 2 Conditional logistic regression analysis to estimate the odds (odd ratio, OR) of CP

Maternal age

 20–24

1

1

 25–29

0.93 (0.41–2.09)

3.36 (0.72–15.71)*

 30–34

1.89 (0.88–4.09)

8.14 (1.39–47.29)*

 35–39

2.16 (0.92–5.05)*

16.66 (2.23–121.69)*

 ≥ 40

3.83 (1.01–14.49)*

73.33 (4.11–1307.11)*

Parity

 Multiparous

1

1

 Primiparous

2.2 (1.34–3.66)*

3.76 (1.81–7.81)*

Paternal age

 ≤ 25

1

 26–30

0.38 (0.08–1.78)*

1.73 (0.233–12.86)

 31–35

1.12 (0.26–4.78)

10.31 (1.19–88.88)*

 36–40

0.95 (0.22–4.07)

5.63 (0.67–47.29)

 41–45

2.00 (0.42–9.55)

6.29 (0.87–121.42)*

 ≥ 46

6.80 (3.31–10.52)

10.30 (0.22–171.15)

Joint age

1.04 (0.99–1.09)*

0.85 (0.72–1.01)*

Fathers level of income

 High

1

1

 Medium

1.91 (0.81–4.50)

1.58 (0.69–3.59)

 Low

2.49 (0.94–6.63)*

0.39 (0.14–1.13)*

Father’s level of education

 Primary

24.61 (7.37–82.21)*

0.29 (0.09–0.95)*

 Secondary

4.62 (2.39–8.96)*

0.1 (0.10–0.17)*

 Tertiary

1

1

Mother’s level of education

 Primary

2.39 (1.27–4.47)*

5.84 (3.21–9.88)

 Secondary

1.95 (0.82–4.65)

1.87 (0.75–4.71)

 Tertiary

1

1