Table 4

Multivariate logistic regression analysis of variables associated with chlamydia infection—subanalysis by sex*

VariableOR (95% CI)
*Variables in the model: age, marital status, ethnic group, total number of partners, condom use with partners, history of gonorrhoea, history of foreign partner, number of same sex partners, alcohol, history of illicit drug use, occupational group, smoking, number of casual partners.
†Divorced, separated, living together, widowed.
Women (n=747)
Occupational group
Homemaker1
Student0.5 (0.3–1)
Unemployed 0.4 (0.2–0.9)
Working 0.4 (0.3–0.7)
Age group
Under 201
20–24 0.3 (0.2–0.5)
25–30 0.3 (0.2–0.4)
Over 30 0.1 (0.07–0.2)
Total number of partners
00.4 (0.03–4.9)
1 0.4 (0.3–0.6)
2 0.6 (0.4–0.9)
Over 21
Smoking
None 12 (1.4–98)
1–5/day0.7 (0.5–1.04)
Over 5/day1
Ethnic group
White1
Black Caribbean 1.9 (1.2–2.8)
Other1.4 (0.9–2.4)
Men (n=624)
Illicit drug use in past year
Yes 1.5 (1.1–2.2)
Total number of partners
00.001 (NS)
1 0.5 (0.3–0.8)
20.8 (0.5–1.2)
Over 21
Condom use with all partners
Never1
Always 0.4 (0.2–0.8)
Sometimes/often0.9 (0.6–1.3)
Smoking
None1180 (NS)
1–5/day0.8 (0.6–1.1)
Over 5/day1
Ethnic group
White1
Black Caribbean 2 (1.4–3.1)
Other1 (0.5–1.9)
Marital status
Single 3.4 (1.6–7.3)
Married1
Other†0.8 (0.2–3.1)