Table 2

Univariate and multivariate logistic regression analysis of determinants for the acquisition of Chlamydia trachomatis (n=115)

	Univariate analysis				Multivariate analysis
	Acquiring Ct	OR	95% CI	p	OR	95% CI	p
Median age of first sexual contact	16	1.03	0.89 to 1.19	0.71
Education
Low	2 (50%)	1
Middle	21 (50%)	1.00	0.13 to 7.78	1.00
High	33 (53%)	1.14	0.15 to 8.59	0.90
Ethnicity
Dutch	44 (52%)	1
Surinamese/Dutch	12 (50%)	0.91	0.37 to 2.25	0.84
Antilles
Asian	3 (60%)	1.36	0.22 to 8.58	0.74
Turkish	1 (50%)	0.91	0.06 to 15.02	0.95
CST before acquiring Ct
I (%)	18 (30%)	1			1
II (%)	0	0	0	0.99	0	0	0.99
III (%)	25 (42%)	2.67	1.08 to 6.59	0.03	2.58	1.01 to 6.61	0.04
IV (%)	15 (25%)	1.49	0.58 to 3.84	0.41	1.42	0.53 to 3.81	0.49
V (%)	2 (3%)	2.78	0.23 to 33.02	0.42	1.60	0.12 to 20.61	0.72
Sexual partners in the previous 6 months
0	2 (33%)	1
1	21 (45%)	1.62	0.27 to 9.69	0.60
2–3	18 (56%)	2.57	0.41 to 16.12	0.31
>3	6 (60%)	3.00	0.36 to 24.92	0.31
Relationship
Living together	1 (14%)	1			1
Living apart	20 (69%)	13.33	1.39 to 127.6	0.03	14.51	1.45 to 145.3	0.02
Single	26 (47%)	5.38	0.61 to 47.7	0.13	5.65	0.62 to 51.5	0.12
Unknown	13 (54%)	7.09	0.74 to 68.2	0.09	7.54	0.76 to 74.9	0.09