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Table 1 Characteristics of those who first injected heroin, using multivariate logistic regression

From: Initiation to heroin injecting among heroin users in Sydney, Australia: cross sectional survey

Characteristic No. participants %1st injected Adjusted odds ratio 95% CI P
Age      
   31+ 184 77 - -  
   25–30 106 60 0.48 0.28–0.83 .008
   ≤ 24 96 54 0.34 0.19–0.61 <.001
Ethnicity      
   Australian 269 67 - - -
   ATSI 69 74 1.18 0.61–2.26 ns
   Other Australians 61 36 0.30 0.16–0.55 <.001
Age 1st injected      
   ≥ 18 164 77 - -  
   <18 234 56 0.63 0.39–1.02 .059
  1. CI = Confidence interval