Table 3.

Number (and Percentage) and Univariate Odds Ratios of Variables Related to Pregnancy

Cases (%)Controls (%)OR (95% CI)
Number of previous pregnancies
 017 (14.2)277 (31.3)1.00
 125 (20.8)242 (27.3)1.68 (0.85, 3.35)
 229 (24.2)181 (20.4)2.61 (1.34, 5.12)
 3+49 (40.8)186 (21.0)4.29 (2.32, 8.02)
Months pregnant when attended antenatal clinic
 0–376 (75.2)660 (86.4)1.00
 4+25 (24.8)104 (13.6)2.09 (1.23, 3.52)
Mother smoked while pregnant
 No38 (33.3)641 (75.1)1.00
 Yes76 (66.7)212 (24.9)6.05 (3.90, 9.40)