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Table 2 Association between age and sharing of injection drug equipment (N = 484)

From: Age and sharing of needle injection equipment in a cohort of Massachusetts injection drug users: an observational study

Characteristic Unadjusted model Multivariable model P-value
Age in years    0.004
 <25 1.72 (1.11, 2.68) 1.99 (1.25, 3.18)  
 ≥25 ref ref  
Frequency of Cocaine/Crack Use    0.002
 Daily   2.75 (1.62, 4.68)  
 1-6 times per week   1.87 (0.90, 3.03)  
 1-3 times per month   1.61 (0.90, 2.85)  
 No use   ref  
Born outside US   2.09 (1.16, 3.79) 0.02
Frequency of Injection Drug Use    0.24
 Daily   1.59 (0.90, 2.82)  
 1-6 times per week   1.73 (0.82, 3.62)  
 1-3 times per month   ref  
  1. Frequency of cocaine/crack use, born outside US, and injection frequency are included in the multivariable model as confounders of the association between age and injection equipment sharing.
  2. Sharing is defined as any sharing of injection drug equipment in the past 30 days.
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