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Table 1 General characteristics of the study population (N = 5128), their bivariate association with HIV-1 antibody status, and results from random effects multiple regression model.

From: Regional differences in HIV prevalence among drug users in China: potential for future spread of HIV?

Variables   Number % HIV + p* OR (95% CI) p
Sample source Detoxification center 2871 56.0 5.8 0.002 1  
  Community 1621 31.6 4.0   0.77 (0.55–1.09) 0.143
  Others1 636 12.4 7.6   0.66 (0.46–0.93) 0.019
Gender Male 4348 84.8 5.5 0.940 1  
  Female 780 15.2 5.4   0.73 (0.50–1.07) 0.111
Age <= 30 2676 52.2 6.2 0.012 1.04 (0.80–1.36) 0.750
  > 30 2452 47.8 4.6   1  
Marital status live without partner 2821 55.0 5.1 0.195 1  
  live with partner 2307 45.0 5.9   1.00 (0.79–1.27) 0.991
Place of residence Local 4393 85.7 5.9 < 0.001 1  
  Transient 735 14.3 2.5   1.27 (0.64–2.51) 0.490
Nation Han 3794 74.0 2.9 < 0.001 1  
  Minority 1334 26.0 12.7   1.38 (0.93–2.04) 0.107
Education <= 9 years 1710 33.4 9.0 < 0.001 1  
  > 9 years 3418 66.6 3.7   1.17 (0.89–1.53) 0.250
Profession white collar 1744 34.0 8.6 < 0.001 1.18 (0.85–1.64) 0.313
  blue collar 3384 66.0 3.8   1  
Monthly income <= 600 2147 41.9 6.9 < 0.001 1  
  601–2000 1127 22.0 4.5   1.56 (1.13–2.15) 0.007
  > 2000 313 6.1 1.9   0.51 (0.24–1.08) 0.080
  Missing 1541 30.1 4.7   1.05 (0.79–1.39) 0.751
Age at first drug use <= 30 4189 81.7 5.5 0.05 1  
  > 30 707 13.8 4.1   0.71 (0.48–1.05) 0.088
  Missing 232 4.5 1.6   0.79 (0.38–1.65) 0.532
IDU and sharing needles (ever) no IDU 2411 47.0 3.7 < 0.001 1  
  IDU, no sharing of needles 1506 29.4 4.9   1.89 (1.37–2.61) < 0.001
  IDU, sharing needles 1211 23.6 9.5   3.15 (2.29–4.33) < 0.001
Having commercial sex in last 12 months No 4455 86.9 5.5 0.148 1  
  Yes 85 1.7 9.4   1.33 (0.66–2.70) 0.4265
  Missing information 588 11.5 4.4   0.73 (0.50–1.06) 0.102
STD symptoms in last 12 months No 4418 86.2 5.3 0.338 1  
  Yes 710 13.9 6.2   0.76 (0.55–1.05) 0.100
  1. 1Outreach programs, contacts of known IDU, unknown.
  2. p* Chi-Square