| Men(N = 1176) | Women(N = 2051) | |
| Only one AFS | 813 (69%) | 986 (48%) |
| AFS considered the mid point between two survey rounds when survey reports transitioning from never having had sex to having had sex | – | 85 (4%) |
| ⩾2 reports: consistent | 89 (8%) | 290 (14%) |
| ⩾2 reports: within a year | 105 (9%) | 226 (11%) |
| ⩾2 reports: inconsistent but most likely AFS possible to identify | 52 (4%) | 232 (11%) |
| ⩾2 reports: inconsistent, mean AFS used | 117 (10%) | 232 (11%) |