Table 3:

Bivariate and multivariate analyses of the relationships between baseline characteristics and development of preeclampsia.

Characteristics	Preeclampsia
	Bivariate analyses		Multivariate analyses
	RR (95%CI)	P-value	aRR (95%CI)	P-value
Age in years
<30	1.00 (ref)	Ref	1.00 (ref)	Ref
30–34	0.78 (0.13–1.62)	0.701	0.84 (0.41–5.10)	0.111
>34	6.19 (2.27–13.01)	0.023	5.62 (2.44–14.79)	0.005
Parity
0–1	1.00 (ref)	Ref	1.00 (ref)	Ref
2–4	2.33 (0.76–7.71)	0.651	1.47 (0.99–9.03)	0.885
>4	4.44 (1.08–10.22)	0.037	5.16 (3.55–8.74)	0.042
Level of Education
Primary	1.00 (ref)	Ref	NA
Secondary	1.05 (0.35–4.49)	0.998	NA
Tertiary	3.78 (1.22–15.16)	0.055	NA
Homocysteine levels
Normal	1.00 (ref)	Ref	1.00 (ref)	Ref
High	4.57 (1.52–11.33)	0.048	3.11 (0.77–9.06)	0.084

Abbreviations: RR, crude risk ratio; CI, confidence interval; aRR, adjusted risk ratio.