Table 1.
General characteristics of female participants at the time of enrolment
| All n (%) | HIV-negative controls n (%) | Incident HIV-positive cases n (%) | |
|---|---|---|---|
| Total | 476 | 166 (34.9) | 167 (35.1) |
| Age at enrolment (years) | |||
| 14–19 | 54 (11.3) | 15 (9.0) | 31 (18.6) |
| 20–24 | 100 (21.0) | 40 (24.1) | 42 (25.2) |
| 25–29 | 73 (15.3) | 27 (16.3) | 24 (14.4) |
| 30–39 | 119 (25.0) | 36 (21.7) | 39 (23.4) |
| 40–49 | 69 (14.5) | 20 (12.1) | 16 (9.6) |
| 50–81 | 61 (12.8) | 28 (16.9) | 15 (9.0) |
| Year of birth | |||
| 1909–1959 | 130 (27.3) | 61 (36.8) | 29 (17.4) |
| 1960–1969 | 137 (28.8) | 54 (32.5) | 30 (18.0) |
| 1970–1979 | 150 (31.5) | 42 (25.3) | 72 (43.1) |
| 1980–1991 | 59 (12.4) | 9 (5.4) | 36 (21.6) |
| Marital status | |||
| Single | 44 (9.3) | 17 (10.2) | 16 (9.6) |
| Married | 232 (48.8) | 100 (60.2) | 80 (48.2) |
| Divorced/sep/widowed | 159 (33.5) | 39 (23.5) | 46 (27.7) |
| Steady partner | 40 (8.4) | 10 (6.0) | 24 (14.5) |
| Year of enrolment (in relation to changes in selection procedures and the provision of treatment within the study) | |||
| Pre-treatment 1990 | 73 (15.3) | 38 (22.9) | 0 |
| 1991–1994 | 103 (21.6) | 70 (42.2) | 26 (15.6) |
| 1995a–2001 | 80 (16.8) | 28 (16.9) | 47 (28.1) |
| PMTCTb: 2002–2003 | 36 (7.6) | 7 (4.2) | 29 (17.4) |
| ARTb: 2004–2008 | 184 (38.7) | 23 (13.9) | 65 (38.9) |
aSelection procedure changed from 1:1 to 1 HIV-negative control enrolled for every 2 new incident cases
bPMTCT/ART introduced in the study clinic, offered to HIV-positive participants