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Table 4 Logistic regression predicting HBV and HCV positive status

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

Demographic factors HBV HCV
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 3.279 (0.286–37.613) 0.340 2.989 (0.257–34.717) 0.381 4.096 (0.405–41.425) 0.232 4.455 (0.438–45.266) 0.207
 26–35 3.735 (2.182–6.393) <0.001 3.500 (2.093–5.855) <0.001 3.650 (1.936–6.881) <0.001 3.818 (2.061–7.072) <0.001
 36–45 2.719 (1.660–4.453) <0.001 2.638 (1.647–4.227) <0.001 2.362 (1.321–4.222) 0.004 2.564 (1.465–4.486) 0.001
 46–55 1.877 (1.202–2.931) 0.006 1.868 (1.232–2.834) 0.003 1.224 (0.713–2.102) 0.464 1.302 (0.777–2.180) 0.316
Gender
 Female (Reference) 1 1 1 1
 Male 1.126 (0.832–1.525) 0.442 1.126 (0.836–1.517) 0.433 1.135 (0.776–1.660) 0.513 1.131 (0.777–1.647) 0.521
Previous donation history
 First-time donor (Reference) 1 1 1 1
 Repeat donor 0.057 (0.029–0.113) <0.001 0.057 (0.029–0.133) <0.001 0.162 (0.088–0.300) <0.001 0.159 (0.087–0.294) <0.001
Ethnicity
 Han (Reference) 1 1 1 1
 Minority 0.892 (0.453–1.755) 0.741 0.961 (0.493–1.873) 0.907 1.336 (0.617–2.891) 0.463 1.338 (0.624–2.869) 0.455
Marital status
 Unmarried (Reference) 1 1 1 1
 Married 0.945 (0.660–1.354) 0.758 0.933 (0.670–1.299) 0.681 0.551 (0.351–0.866) 0.010 0.515 (0.338–0.785) 0.002
Occupation
 Others (Reference) 1 1 1 1
 Teacher/civil servant/medical worker 0.276 (0.082–0.934) 0.039 0.276 (0.082–0.932) 0.038 0.348 (0.081–1.493) 0.155 0.343 (0.080–1.471) 0.150
 Farmer 1.720 (0.976–3.032) 0.061 1.748 (0.993–3.078) 0.053 1.388 (0.672–2.867) 0.375 1.377 (0.672–2.824) 0.382
 Student 1.793 (1.037–3.098) 0.036 1.634 (0.966–2.764) 0.067 0.835 (0.405–1.723) 0.626 0.869 (0.430–1.756) 0.695
 Worker 1.375 (0.934–2.025) 0.106 1.417 (0.965–2.080) 0.075 1.042 (0.639–1.698) 0.870 1.030 (0.633–1.674) 0.906
 Company employee 1.677 (1.101–2.555) 0.016 1.743 (1.150–2.640) 0.009 1.021 (0.587–1.775) 0.942 1.012 (0.586–1.750) 0.965
Education
 Secondary School or below (Reference) 1 1 1 1
 Masters/Bachelor degree 0.727 (0.481–1.098) 0.129 0.705 (0.487–1.023) 0.066 0.717 (0.428–1.201) 0.206 0.645 (0.402–1.035) 0.069
 Associate degree 0.988 (0.668–1.462) 0.952 1.004 (0.689–1.464) 0.983 0.989 (0.606–1.615) 0.966 0.931 (0.577–1.502) 0.769