Table 2.

Factors associated with diagnosis of HIV infection prior to pregnancy

	N	N (%) diagnosed pre-pregnancy	Odds ratio (95% CI)	Adjusted odds ratio (95% CI), p value
Mode of acquisition
Non IDU, no IDU sex partner	1573	338 (21)	1.00	1.00
Non IDU, IDU sex partner	696	195 (28)	1.42 (1.16–1.75)	1.46 (1.19–1.80) p < 0.001
IDU	601	263 (44)	2.85 (2.33–3.48)	2.94 (2.38–3.63) p < 0.001
Maternal age
<25 years	1303	298 (23)	0.65 (0.52–0.80)	0.79 (0.63–0.99) p = 0.04
25–30 years	939	300 (32)	1.02 (0.82–1.27)	1.12 (0.90–1.41) p = 0.31
≥30 years	629	198 (31)	1.00	1.00
Maternal moderate/severe HIV symptoms
No	2753	733 (27)	1.00	1.00
Yes	118	63 (53)	3.16 (2.18–4.58)	2.32 (1.57–3.42) p < 0.001
Time period of delivery
2000–2001	187	45 (24)	1.00	1.00
2002–2003	431	99 (23)	0.94 (0.63–1.41)	1.06 (0.70–1.60) p = 0.8
2004–2005	977	243 (25)	1.05 (0.73–1.51)	1.19 (0.81–1.74) p = 0.37
2006–2007	1276	409 (32)	1.49 (1.04–2.12)	1.87 (1.29–2.72) p < 0.001

95%CI – 95% confidence interval