Enrollment Eligibility  Eligibility for enrollment was
determined by a screener using a standardized eligibility
worksheet. The screener first determined if the participant was
seeking enrollment as an individual or as a couple. Age was
determined by asking the volunteer’s age and year of birth.
Unmarried participants had to be 18 years or older to
participate; married volunteers were considered to be adults
regardless of their age. Volunteers were also ineligible if they
were not planning to remain in the area for at least one year.
Because the study was designed to test the effectiveness of
counseling and testing in preventing new HIV infections,
volunteers who had been tested and knew themselves to be
infected with HIV were also ineligible for the study. These
participants were referred for additional counseling or services
as needed. Finally, the screener asked if the volunteer had a
spouse or sexual partner already enrolled in the study. If so,
the volunteer was not eligible to enroll but could receive