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Table 5 Logistic regression predicting HIV and Syphilis positive status

From: Demographic characteristics of transfusion-transmitted infections among blood donors in China

Demographic factors HIV Syphilis (TP)
Bivariate analysis Multivariable analysis Bivariate analysis Multivariable analysis
OR (95% CI) p-value aOR (95% CI) p-value OR (95% CI) p-value aOR (95% CI) p-value
Age
 >55 (Reference) 1 1 1 1
 18–25 2.680 (0.284–25.336) 0.390 1.625 (0.176–14.989) 0.668 3.843 (0.648–22.804) 0.138 3.879 (0.645–23.334) 0.139
 26–35 0.853 (0.311–2.341) 0.757 0.749 (0.281–1.999) 0.564 3.714 (2.174–6.344) <0.001 3.784 (2.245–6.377) <0.001
 36–45 1.044 (0.504–2.165) 0.907 0.870 (0.429–1.763) 0.698 4.479 (2.798–7.171) <0.001 4.576 (2.905–7.208) <0.001
 46–55 1.329 (0.774–2.280) 0.302 1.316 (0.791–2.187) 0.290 2.647 (1.721–4.072) <0.001 2.652 (1.757–4.002) <0.001
Gender
 Female (Reference) 1 1 1 1
 Male 9.652 (3.863–24.115) <0.001 10.393 (4.193–25.762) <0.001 0.532 (0.406–0.697) <0.001 0.565 (0.434–0.736) <0.001
Previous donation history
 First-time donor (Reference) 1 1 1 1
 Repeat donor 1.056 (0.677–1.646) 0.811 1.149 (0.749–1.762) 0.525 0.309 (0.219–0.437) <0.001 0.306 (0.216–0.432) <0.001
Ethnicity
 Han (Reference) 1 1 1 1
 Minority 1.146 (0.421–3.116) 0.790 0.906 (0.342–2.401) 0.843 2.406 (1.421–4.072) 0.001 2.309 (1.378–3.868) 0.001
Marital status
 Unmarried (Reference) 1 1 1 1
 Married 0.528 (0.315–0.884) 0.015 0.499 (0.300–0.830) 0.007 0.623 (0.443–0.876) 0.006 0.764 (0.554–1.053) 0.100
Occupation
 Others (Reference) 1 1 1 1
 Teacher/civil servant/medical worker 0.598 (0.135–2.641) 0.497 0.608 (0.139–2.661) 0.509 0.357 (0.135–0.941) 0.037 0.362 (0.138–0.950) 0.039
 Farmer 0.653 (0.148–2.888) 0.575 0.635 (0.145–2.788) 0.547 0.793 (0.436–1.443) 0.448 0.838 (0.462–1.521) 0.562
 Student 2.587 (1.203–5.567) 0.015 1.878 (0.909–3.882) 0.089 0.653 (0.351–1.214) 0.178 0.532 (0.293–0.968) 0.039
 Worker 2.598 (1.539–4.374) <0.001 2.718 (1.624–4.550) <0.001 0.795 (0.540–1.170) 0.245 0.831 (0.568–1.216) 0.340
 Company employee 2.325 (1.301–4.155) 0.004 2.535 (1.439–4.465) 0.001 0.788 (0.513–1.210) 0.275 0.799 (0.522–1.221) 0.299
Education
 Secondary School or below (Reference) 1 1 1 1
 Masters/Bachelor degree 0.657 (0.350–1.232) 0.190 0.667 (0.381–1.169) 0.157 0.596 (0.398–0.892) 0.012 0.520 (0.358–0.756) 0.001
 Associate degree 1.884 (1.168–3.037) 0.009 1.977 (1.245–3.139) 0.004 0.738 (0.506–1.077) 0.115 0.723 (0.499–1.047) 0.086