Skip to main content
. Author manuscript; available in PMC: 2020 Aug 20.
Published in final edited form as: Contraception. 2010 Aug 5;83(1):74–81. doi: 10.1016/j.contraception.2010.06.012

Table 4:

Adjusted odds ratios of possible explanatory variables for pregnancy risk in a U.S. microbicide cohort: conditional logistic regression (n=91*)

Participant attribute Odds ratio 95% CI p-value
Age (continuous, referenced to age 19 years†) 0.88 0.79 0.98 0.02
Self and partner desire a baby in the future 4.95 1.35 18.09 0.02
Changed contraceptive while enrolled in HPTN035 1.57 0.41 6.04 0.52
*

Participants with prior tubal ligation were not included.

†

Given that the youngest age in our dataset is 19, we used this, instead of the usual age of zero, as our reference point. Therefore, with regard to the age variable, the odds of becoming pregnant decreased by a ratio of 0.871 for each a unit increase in age above 19 years.