Table 2.

Factors associated with engagement in concurrent partnerships among men aged 15–17 and 18–19 who had at least one sexual partner in past 6 months, Vijana Vijiweni Project, Dar es Salaam, Tanzania, 2008

Characteristic	15–17 year olds (N=142)b				18–19 year olds (N=268)c
	n	% Reported Concurrencya	Adjusted Model		n	% Reported Concurrencya	Adjusted Model
			OR (95% CI)	p			OR (95% CI)	p
Demographics
Age
15	14	42		n.s.	114	50	.74 (.54–1.02)	.07
16/18	55	39		n.s.	153	50
17/19	73	45
Education
In school	81	33	1.85 (1.13–3.02)	.02*	57	45	.	n.s.
Not in school	61	54			208	51
Where slept last night
At parents’ home	121	42			117	38	2.05 (1.50–2.80)	<.001*
Not at parents’ home	21	47		n.s	148	58
Individual risk factors
Age at first sex
≥15	79	31	1.91 (1.24–2.94)	<.001*	195	43	2.38 (1.62–3.50)	<.001*
<15	63	57			69	68
Other venues attended
None	41	28			77	40		n.s.
One	37	46	2.24 (1.19–4.21)	.01	73	49	1.58 (.99–2.53)
Two or more	55	51	1.68 (0.91–3.09)	.10*	101	57		.06*
Recent STI symptoms
None	109	39	1.70 (.92–3.12)	.09*	187	41
At least one	33	53			77	70		n.s.*
Total sexual partners past six months
1 or 2 sex partners	125	35	17.90 (4.31–74.33)	<.001*	171	29	9.58 (6.31–14.54)	<.001*
>2 sex partners	17	94			96	86
Partnership-level risk factors
Drank alcohol at least a few times before sex
With no partners	109	40			132	31
With 1 or more partners	33	51		n.s.	135	67	2.07 (1.45–2.94)	<.001*
Met sexual partners at venue
None	103	37	1.70 (.90– 3.22)		161	37	1.45 (1.05– 2.00)
One or more partners	39	56		.10*	106	69		.03*
Condom use at last sex
With all partners	30	34			77	45
Didn’t use with at least one partner	109	46		n.s.*	185	52		n.s.*

^*p≤.10 in unadjusted model

^aWeighted percentages.

^bAdjusted model included 141 men with data on all variables.

^cAdjusted model included 263 men with data on all variables.