Table 1 Baseline characteristics of enrolled HIV-1 serodiscordant couples in the Partners Demonstration Project (N = 1013)

Age of HIV-1 uninfected partner

29 (26–36)

 18–20

38 (3.8)

 21–30

534 (52.7)

  ≥ 31

441 (43.5)

Number of children within partnership^a

0 (0–1)

 0

572 (56.5)

 1–2

334 (33.0)

  ≥ 3

107 (10.6)

Not circumcised (male HIV-1 uninfected only)

225 (33.1)

Married/ cohabitating with study partner^a

991 (97.8)

Unprotected sex in month prior to enrollment^a

656 (64.8)

Viral load of HIV-1 infected partner

4.6 (3.8–5.0)

  < 10,000

280 (28.1)

 10,000–49,999

301 (30.2)

  ≥ 50,000

417 (41.8)