Table 3. Association between Incidence of sexual debut and peer related predictors by sex among adolescents in Morogoro, Tanzania (N = 316).
| Males (n = 164) | Females (n = 148) | ||||||||
| Variable | category | Events | PYAR♯ | IR† | p-value | Events | PYAR | IR | p-value |
| Have older | Yes | 7 | 415 | 16.9 | 0.904 | 6 | 434 | 13.8 | 0.353 |
| sibling regnant at less than 20 years | No | 37 | 2292 | 16.1 | 39 | 1957 | 19.9 | ||
| Ever had | Yes | 39 | 1436 | 27.2 | 0.000 | 38 | 1057 | 36.0 | 0.000 |
| boy/girlfriend | No | 5 | 1271 | 3.9 | 7 | 1334 | 5.2 | ||
| Currently have | Yes | 29 | 626 | 46.3 | 0.000 | 32 | 684 | 46.7 | 0.000 |
| a boy/girlfriend | No | 15 | 2081 | 7.2 | 13 | 1707 | 7.6 | ||
| Boy/girlfriend occupation | Fellow student | 25 | 535 | 46.7 | 0.627 | 10 | 214 | 46.7 | 0.874 |
| College student | 31 | 79 | 37.9 | 16 | 318 | 50.3 | |||
| Employed | 2 | 41 | 48.7 | 8 | 194 | 41.2 | |||
| Do girl/boyfriend | 14 | 2052 | 6.8 | 11 | 1665 | 6.6 | |||
| Friend have sexual partners | Yes | 39 | 1388 | 28.1 | 0.000 | 40 | 1188 | 33.7 | 0.000 |
| No | 5 | 11319 | 3.8 | 5 | 203 | 4.1 | |||
| Friend engage | Yes | 28 | 1041 | 26.9 | 0.000 | 28 | 757 | 37.0 | 0.000 |
| in sex | No | 16 | 1666 | 9.6 | 17 | 1634 | 10.4 | ||
| Discussed | Yes | 40 | 2002 | 20.0 | 0.004 | 43 | 1911 | 22.5 | 0.004 |
| relationship with friends | No | 4 | 750 | 5.7 | 2 | 480 | 4.2 | ||
| Friend ever | Yes | 23 | 805 | 28.6 | 0.000 | 23 | 947 | 24.3 | 0.029 |
| No | 21 | 1902 | 11.0 | 22 | 1444 | 15.2 | |||
| been pregnant or made someone pregnant | |||||||||
| You drink | Yes | 13 | 354 | 36.7 | 0.000 | 12 | 210 | 57.1 | 0.000 |
| alcohol | No | 31 | 2353 | 13.2 | 33 | 2181 | 15.1 | ||
| Peer drink | Yes | 21 | 733 | 28.6 | 0.001 | 18 | 431 | 41.8 | 0.000 |
| alcohol | No | 23 | 1974 | 11.7 | 27 | 1960 | 13.8 | ||
♯
PYAR, Person years at risk of sexual debut;
†
IR, Incidence rate, p-value from log-rank test.