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Table 2 Unadjusted and Adjusted Odds Ratios for Associations between Risk Factors and Blood-borne Viruses’ Positive Results

From: Risk factors associated with infection of blood-borne virus among people who used methamphetamine

   Model 1 Model 2 Model 3
Variable uOR [95% CI] aOR [95% CI] aOR [95% CI] aOR [95% CI]
Gender
 Male# 1 1 1 1
 Female 0.81 [0.46, 1.41] 0.82 [0.47, 1.42] 0.86 [0.45, 1.63] 0.93 [0.45, 1.95]
Age
 20–29 years# 1 1 1 1
 30–39 years 1.45 [0.50, 4.20] 1.44 [0.49, 4.23] 2.01 [0.60, 6.75] 1.58 [0.42, 5.99]
 40–49 years 3.22 * [1.02, 10.16] 3.19 [0.98, 10.36] 5.64 * [1.41, 22.62] 4.77 * [1.11, 20.55]
 50–59 years 5.45 ** [1.63, 18.26] 5.31 * [1.54, 18.24] 13.09 *** [3.21, 53.43] 10.25 ** [2.40, 43.82]
Race
 Non-Hispanic White# 1 1 1 1
 Non-Hispanic Black 2.05 * [1.06, 3.95] 1.88 [0.98, 3.62] 0.84 [0.32, 2.24] 0.77 [0.25, 2.34]
 Hispanic/Other 0.73 [0.43, 1.24] 0.95 [0.55, 1.63] 0.66 [0.37, 1.19] 0.74 [0.37, 1.46]
Poverty index
  > =2# 1   1 1
 1 to 1.9 2.34 ** [1.29, 4.27]   2.93 ** [1.44, 5.98] 2.55 * [1.19, 5.49]
 Below threshold 3.19 ** [1.62, 6.29]   3.68 ** [1.48, 9.17] 2.55 * [1.11, 5.86]
Health Insurance
 Yes# 1   1 1
 No 1.32 [0.82, 2.13]   1.16 [0.65, 2.07] 1.00 [0.52, 1.92]
Healthcare access
 Yes# 1   1 1
 No 1.27 [0.77, 2.11]   1.17 [0.71, 1.93] 1.11 [0.63, 1.95]
Education
  > =12 H.S. or GED# 1   1 1
  < 12 H.S. 2.28 ** [1.27, 4.11]   2.95 ** [1.44, 6.05] 3.13 ** [1.51, 6.46]
Number of sexual partners
  < 2# 1   1 1
  > =2 1.33 [0.85, 2.07]   1.84 * [1.09, 3.11] 1.41 [0.78, 2.54]
Sexual identity
 Heterosexual# 1   1 1
 Other 4.07 ** [1.71, 9.68]   4.53 ** [1.78, 11.55] 5.60 ** [1.72, 18.28]
Number of drug use
 1 [only methamphetamine]# 1    1
 2 [methamphetamine + heroin or cocaine] 1.74 [0.75, 4.07]    1.69 [0.53, 5.41]
 3 [methamphetamine + heroin and cocaine] 7.24 *** [2.93, 17.89]    4.24 * [1.06, 16.92]
Injection drug use
 No# 1    1
 Yes 5.75 *** [3.40, 9.70]    3.15 ** [1.61, 6.16]
Number of times use drug
  < =5 times# 1    1
 6–49 times 1.44 [0.71, 2.94]    1.09 [0.47, 2.52]
  > =50 times 2.55 ** [1.29, 5.02]    1.29 [0.53, 3.14]
Age started using methamphetamine
 10–17 years# 1    1
 18–25 years 0.77 [0.39, 1.51]    0.99 [0.44, 2.24]
 > =26 years 2.22 ** [1.26, 3.91]    2.09 * [1.01, 4.35]
  1. Abbreviations: uOR unadjusted odds ratio, aOR adjusted odds ratio, HS high school, GED General Education Development
  2. 1. # indicates reference category
  3. 2. Statistical significance: *** p < 0.001; ** p < 0.01; * p < 0.05