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Table 5 Predictors of STI history in participants who had sexual intercourse ever

From: Sexual behaviour, sexually transmitted infections and attitudes to chlamydia testing among a unique national sample of young Australians: baseline data from a randomised controlled trial

Risk factor Percent (%) in exposed group Percent (%) in unexposed group Unadjusted odds ratio Adjusted odds ratio (95% CI) P value
N 164 524    
Gender (female)* 23.9% 23.5% 0.98 -  
Aboriginal and/or Torres Strait Islander* 38.1% 23.4% 2.41 - -
English at home* 24.2% 11.5% 2.44 - -
Age 20 years and older 29.0% 13.1% 2.72 1.95 (1.22, 3.12) 0.005
Age first intercourse < = 15 years* 26.4% 22.6% 1.23 -  
Condom use never or sometimes 28.5% 19.7% 1.61 1.48 (1.02, 2.16) 0.04
Three or more sexual partners ever 32.3% 7.0% 6.34 4.78 (2.67, 8.54) <0.0001
Six or more sexual partners last 12 months 45.9% 21.1% 2.01 2.25 (1.34, 3.79) 0.002
  1. *Not significant predictors in multivariate logistic regression.