Participant observation informants: individual reliability of reported sex in 1998–2000 assisted self-completion questionnaires (ASCQs) and face to face questionnaires (FFQs), with validation using participant observation reports
| Reported vaginal intercourse in 1998–2000 ASCQ and FFQ | Number (%) of males | Number (%) of females | Total (%) (n = 22) | |
|---|---|---|---|---|
| Self-report* (n = 5) | Self-report* (n = 5) | Third person report (n = 12) | ||
| *Data for the one male and one female trial participants who denied sex are not included here. | ||||
| Italicised figures represent results that are inconsistent and/or invalid given participant observation reports. | ||||
| Consistently reported | 1 (20) | 1 (8) | 2 (9) | |
| Denied earlier and reported later | 2 (60) | 3 (60) | 5 (42) | 10 (46) |
| Consistently denied | 1 (20) | 1 (20) | 2 (17) | 4 (18) |
| Inconsistently reported | 1 (20) | 1 (20) | 4 (33) | 6 (27) |