Table 2.

Comparison of HIV incidence rates for demographic risk factors using bivariable Poisson regression models (n=957)

	Number	Number SC	Risk ratio (95% CI)	p-value*
Province	–	–	–	–
Maputo	499	20	–	–
Gaza	458	21	1.27 (0.69–2.34)	0.45
Age (years)	947	41	0.93 (0.87–0.99)	0.02
Age category (years)	–	–	–	–
18–19	164	10	–	–
20–24	341	16	0.67 (0.31–1.52)	0.36
25–29	218	10	0.71 (0.30–1.71)	0.44
30–34	138	4	0.44 (0.14–1.40)	0.16
> 34	86	1	0.17 (0.02–1.33)	0.09
Marital status	–	–	–	–
Married or living together	665	24	–	–
Divorced/separated/widow/single	200	10	1.37 (0.66–2.87)	0.40
Relationship but not living with partner	90	7	2.13 (0.92–4.95)	0.08
Polygamous marriage	–	–	–	–
No	508	17	–	–
Yes	86	5	1.75 (0.64–4.73)	0.27
Number of children	–	–	–	–
< 3	455	26	–	–
≥ 3	493	14	0.48 (0.25–0.93)	0.03
Educational level	–	–	–	–
Less than primary education	617	26	–	–
Primary education or higher	340	15	0.99 (0.52–1.86)	0.96
Partner educational level	–	–	–	–
Less than primary education	407	10	–	–
Primary education or higher	407	22	2.10 (1.01–4.50)	0.05
Ever had a job	–	–	–	–
No	806	34	–	–
Yes	142	7	1.14 (0.50–2.57)	0.76
Partner employment	–	–	–	–
No job	167	6	–	–
Employee	208	3	1.71 (0.61–4.80)	0.31
Mineworker	225	8	0.38 (0.09–1.51)	0.17
Other	101	5	1.02 (0.35–2.93)	0.98
Own business	149	9	1.23 (0.36–4.03)	0.73
Partner works out >4 weeks	–	–	–	–
No	604	28	–	–
Yes	324	10	0.67 (0.32–1.38)	0.27

SC, seroconversion; CI, confidence interval.

^*p-values from Poisson regression models (i.e. generalized linear models using the Poisson distribution with the log link and an offset accounting for person-years).

Boldfaces means significant (p<0.05).