Table 5. Hazard ratios for detectable (>56 copies/ml) breastmilk HIV RNA load as a risk factor for breastmilk HIV-1 transmission.

	Complete Case				Imputed
	Unadjusted*		Adjusted**		Unadjusted*		Adjusted**
	Hazard Ratio	(95% CI)	Hazard Ratio	(95% CI)	Hazard Ratio	(95% CI)	Hazard Ratio	(95% CI)
Maternal and Infant Arm
Detectable vs. Undetectable	2.7	(1.4, 5.4)	7.4	(3.2, 17.1)	2.9	(1.0, 8.4)	3.8	(1.2, 12.1)
Viral load by study arm
Maternal ARV: Detectable vs. Undetectable	5.6	(2.5, 12.7)	7.8	(3.1, 19.2)	4.8	(1.5, 15.8)	4.4	(1.3, 15.2)
Infant NVP: Detectable vs. Undetectable	3.9	(0.8, 18.0)	6.0	(1.2, 31.4)	2.8	(0.5, 15.0)	2.9	(0.5, 17.7)

^*Combined maternal and infant arm models contained no confounding variables. Viral load by study arm models contained study arm and an interaction term between breastmilk viral load and study arm.

^**Adjusted for continuous baseline maternal age, baseline maternal CD4+, baseline maternal hemoglobin level, and baseline maternal plasma viral load. Study arm was included as a confounding variable in combined maternal and infant arm models. Viral load by study arm models included an interaction term between breastmilk viral load and study arm.