Participant observation informants: aggregate comparison of reported sex in 1998–2000 participant observation, assisted self-completion questionnaires (ASCQs) and face to face questionnaires (FFQs)
| Participant observation informants* | n | Number (%) reporting vaginal intercourse | ||||
|---|---|---|---|---|---|---|
| 1998 ASCQ | 1998 FFQ | 1999–2000 participant observation | 2000 ASCQ | 2000 FFQ | ||
| *MkV trial participants for whom there were specific reports of sex during the 1999–2000 participant observation. | ||||||
| Male: participant observation self report | 6 | 2/4 (50) | 2/6 (33) | 5/6 (83) | 4/4 (100) | 4/6 (67) |
| Female: participant observation self report | 6 | 0/5 (0) | 1/6 (17) | 5/6 (83) | 3/4 (75) | 2/5 (40) |
| Female: participant observation third person report | 12 | 3/8 (38) | 2/10 (20) | 12/12 (100) | 3/8 (38) | 5/8 (63) |
| Total | 24 | 5/17 (29) | 5/22 (23) | 22/24 (92) | 10/16 (63) | 11/19 (58) |