Active Drug-Using Women Use Female-Initiated Barrier Methods to Reduce HIV/STI Risk: Results from a Randomized Trial

Table 2

Paired comparisons, mean frequency of unprotected vaginal sex, baseline to followup, by partner type (𝑁=189; 94 controls, 95 intervention)*.

Partner type	Baseline; mean	12-month follow-up mean	P value; change**; over time	P-value; change**; across arms
Primary partner	34.3	15.6	0.000
Control	32.7	19.3	0.008	0.075
Intervention	35.9	12.3	0.000
Non-primary, HIV-negative partner	22.7	2.9	0.000
Control	21.6	2.5	0.000	0.80
Intervention	23.8	3.5	0.002

∗Absence of acts or no partner equals zero unprotected acts (see Methods).
∗∗Change defined as follow-up frequency − baseline frequency.