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Table 3 Logistic regression predicting TTIs positive status

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

Demographic factors TTIs
Bivariate analysis Multivariable analysis
OR (95% CI) p-value aOR (95% CI) p-value
Age
 >55 (Reference) 1 1
 18–25 2.690 (0.724–10.000) 0.140 2.616 (0.705–9.713) 0.151
 26–35 2.874 (1.982–4.167) <0.001 2.799 (1.948–4.023) <0.001
 36–45 2.611 (1.879–3.627) <0.001 2.562 (1.862–3.525) <0.001
 46–55 1.802 (1.351–2.404) <0.001 1.813 (1.376–2.389) <0.001
Gender
 Female (Reference) 1 1
 Male 0.994 (0.810–1.219) 0.951 1.041 (0.852–1.271) 0.697
Previous donation history
 First-time donor (Reference) 1 1
 Repeat donor 0.260 (0.203–0.334) <0.001 0.261 (0.204–0.334) <0.001
Ethnicity
 Han (Reference) 1 1
 Minority 1.480 (0.963–2.273) 0.074 1.489 (0.974–2.276) 0.066
Marital status
 Unmarried (Reference) 1 1
 Married 0.681 (0.533–0.870) 0.002 0.720 (0.573–0.904) 0.005
Occupation
 Others (Reference) 1 1
 Teacher/civil servant/medical worker 0.350 (0.179–0.684) 0.002 0.355 (0.181–0.694) 0.002
 Farmer 1.176 (0.761–1.817) 0.465 1.191 (0.772–1.838) 0.430
 Student 1.119 (0.769–1.628) 0.556 1.000 (0.695–1.438) 1.000
 Worker 1.187 (0.908–1.552) 0.209 1.227 (0.940–1.601) 0.133
 Company employee 1.208 (0.901–1.620) 0.206 1.256 (0.940–1.678) 0.123
Education
 Secondary School or below (Reference) 1 1
 Masters/Bachelor degree 0.643 (0.488–0.848) 0.002 0.602 (0.467–0.775) <0.001
 Associate degree 1.007 (0.776–1.307 0.957 0.992 (0.770–1.277) 0.947