Table 2. Association between Incidence of sexual debut and socio-demographic and parental/guardian 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
Age	16	16	543	29.4	0.052	6	207	28.9	0.661
	17	12	776	15.5		14	757	18.4
	18	11	907	12.1		18	983	18.3
	19	5	481	10.4		7	444	15.7
Religion	Muslim	17	1317	12.9	0.162	23	1197	19.2	0.871
	Christian	27	1390	19.4		22	1194	18.4
Grown residence	Rural	9	316	28.4	0.050	13	278	46.7	0.000
	Urban	35	2391	14.6		32	2113	15.1
Mother alive	Yes	29	2258	12.8	0.000	34	2036	16.6	0.030
	No	15	449	33.4		11	355	30.9
Father alive	Yes	29	2084	13.9	0.045	30	1802	16.6	0.151
	No	15	623	24.1		15	589	25.4
Fathers education	Primary	23	1310	17.5	0.804	25	1210	20.6	0.441
	Secondary	14	890	15.7		12	835	14.4
	Post-secondary	7	507	13.8		8	346	23.1
Mothers education	Primary	34	1653	20.5	0.026	25	1240	20.1	0.531
	Secondary	6	851	7.0		12	801	15.0
	Post-secondary	4	203	19.7		8	350	22.8
Raising person	Both parents	14	1733	8.0	0.000	14	1366	10.0	0.000
	One parent	9	374	24.0		20	537	37.2
	Relatives	21	600	35.0		11	488	22.5
Current live with	Parents	18	1766	10.2	0.000	14	1469	9.5	0.000
	Relatives	20	586	34.1		19	670	28.3
	Siblings	6	355	16.9		12	252	47.6
Relation to	Very good	18	1606	11.2	0.006	14	1240	11.3	0.000
parents/guardian	Good	14	719	19.5		15	767	19.6
	Average/poor	12	382	31.4		16	384	41.7
Person easy to talk	None	6	216	27.8	0.070	7	108	64.8	0.000
to	Father	9	338	26.6		4	140	28.6
	Mother	15	1033	14.5		23	192	17.8
	Both	14	1120	12.5		11	851	12.9
Talked about puberty to parent/guardian	Yes	10	984	10.2	0.038	15	1507	9.9	0.000
	No	34	1723	19.7		30	884	33.9
Discussed	Yes	15	1173	12.8	0.183	18	1544	11.6	0.001
relationship with parent/guardian	No	29	1534	18.9		27	847	31.8
Talked about delay	Yes	18	1758	10.2	0.000	19	1574	12.0	0.001
sex with parent/guardian	No	26	949	27.4		26	817	31.8
Discussed impact of	Yes	16	1797	8.9	0.000	24	1878	12.8	0.000
early sex with parent/Guardian	No	28	910	30.7		21	513	40.9
Discussed teen	Yes	16	1513	10.5	0.004	19	1683	11.3	0.000
pregnancy with parent/guardian	No	28	1194	23.4		26	708	36.7
Discussed about	Yes	19	1562	12.2	0.027	18	1639	10.9	0.000
HIV with parent/guardian	No	25	1145	21.8		27	752	35.9
Parent knows your	Yes	30	2258	13.3	0.002	27	1905	14.2	0.000
friends	No	14	449	31.2		18	486	37.0
Parent drink alcohol	Yes	13	514	25.3	0.057	21	561	37.4	0.000
	No	31	2193	14.1		24	1830	13.1

^♯PYAR, Person years at risk of sexual debut;

^†IR, Incidence rate, p-value from log-rank test.