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Table 4 Age-adjusted odds ratio (AOR) of risk of HIV by survey time comparing 2003 and 1995, adjusting for sexual behaviour variables, for urban men aged 15–24

From: Associations between sexual behaviour change in young people and decline in HIV prevalence in Zambia

One by one behaviour indicator included

Behaviour indicator

Chi-square change

AOR

95% CI

Number of sex partners past 12 months**

-15.0

0.72

0.36–1.42

Casual partner past year

-20.59

0.66

0.27–1.64

Condom use at last sexual intercourse

-18.77

0.70

0.38–1.27

Ever used condom

-19.06

0.68

0.40–1.16

Used condom at last casual sexual intercourse

-21.07

1.12

0.71–1.77

STI past year*

21.98

0.55

0.32–0.94

  1. Notes: Before adding the behaviour variables the Chi square was 22.19 and AOR 0.55 (0.31–0.96) in 2003 compared to 1995. If the chi square changed > |3.84|, the added variable was a confounding variable. The denominator was the number of sexually active respondents during the year prior to the survey. *The Chi square change was significant, but the AOR was unchanged. **The chief confounder in this step.