Table 4. Odds ratios of virologic failure in plasma^Δ.

Maternal Sociodemographic and Clinical Characteristics	6–14 weeks postpartum			18–24 weeks postpartum
	N	Multivariate aOR (95% CI)	p-value	N	Multivariate aOR (95% CI)	p-value
Maternal age (years)	37	*		34	*
Gestation at ART start (weeks)		1.25 (1.04, 1.51)	0.02		1.16 (1.02, 1.33)	0.03
Length of time on ART at enrollment		1.03 (1.00, 1.06)	0.04		1.03 (1.00, 1.05)	0.02
Low CD4 count at 6–14 wks postpartum		3.74 (0.37, 38.0)	0.27		24.54 (1.54, 391.02)	0.02

N = number of women OR = Odds Ratio. aOR = adjusted Odds Ratio. All listed variables were considered for the multivariate model.

^Δ Threshold for virologic failure in plasma: >1000 copies/mL.

* Excluded from the final multivariate model.