Effect of Efavirenz on Endogenous Progesterone Concentrations and Contraceptive Outcomes among Ugandan HIV Infected Women Coadministering Ethinylestradiol/Levonorgestrel

Table 3

Factors associated with progesterone levels among HIV positive women on efavirenz based HAART in binary logistic regression analysis.

Variable	OR	95% CI	p value
Efavirenz conc. (µg/ml)	1.08	0.90–1.30	0.39
Age (yrs)	1.04	0.85–1.27	0.70
Weight (Kgs)	1.12	0.97–1.29	0.14
	0.71	0.22–2.32	0.57
Sday
Sday (1)	7.50	0.34–167.78	0.20
Sday (2)	21.30	1.06–426.64	0.04

between last dose of efavirenz or COC and sampling; Sday = reference sampling day (day 22), Sday (1) = sampling day 20, and Sday (2) = sampling day 21 of the menstrual cycle.