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Table 3 Negative binomial regression for frequency of using HDS needles in Khudjand

From: Feasibility of needle and syringe programs in Tajikistan distributing low dead space needles

  IRR (95% CI) p value IRR (95% CI) p value
Gender (female = 0, male = 1) 2.05 (1.25, 3.37) 0.005   
Age in years 0.98 (0.95, 1.01) 0.202   
Completed high school or more (no = 0, yes = 1) 0.72 (0.43, 1.21) 0.217   
Prefers regular needles to LDS needles = 1.00 1.95 (1.25, 3.02) 0.003   
Pharmacy main source of syringes 1.48 (0.92, 2.38) 0.106   
Unable to get LDS 0.55 (0.36, 0.83) 0.004 0.60 (0.39, 0.91) 0.016
Injected homemade opiates 1.48 (0.83, 2.66) 0.187 1.54 (0.85, 2.79) 0.158
Like LDS because they waste less drugs 0.94 (0.63, 1.42) 0.775   
Like LDS because needles because they are free 1.87 (0.22, 15.69) 0.564   
Like LDS needles because they make it easier to split drugs accurately 0.70 (0.41, 1.19) 0.187   
Like LDS needles because less infected blood stays in them 0.81 (0.50, 1.31) 0.397   
Usually used 12-mm/ 0.5-in. needles 0.91 (0.53, 1.55) 0.730   
Usually used 1-mL syringes 1.02 (0.66, 1.58) 0.932   
Number of times injected heroin mixed with dimedrol in the last 30 days? 1.04 (1.02, 1.05) < 0.001   
Number of times injected heroin by itself in the last 30 days? 1.02 (0.99, 1.05) 0.166   
Number of injections in the last 30 days? 1.06 (1.04, 1.08) < 0.001 1.06 (1.04, 1.08) < 0.001
Number of days between the start of the study and follow-up interview completed 1.00 (0.98, 1.02) 0.931