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Table 1 Baseline characteristics of study participants

From: Immunogenicity and safety of 4 vs. 3 standard doses of HBV vaccination in HIV-infected adults with isolated anti-HBc antibody

Baseline characteristics 3-dose group (n = 27) 4-dose group (n = 27) p-value
Age, years (mean ± SD) 45.8 ± 13.5 46.6 ± 11.0 0.826
Male 16 (59.3%) 16 (59.3%) 1.000
Risk of HIV acquisition 0.487
 Heterosexual 19 (70.4%) 21 (77.8%)  
 Homosexual (MSM) 7 (25.9%) 5 (18.5%)  
 Blood transfusion 1 (3.7%) 0  
 IVDU 0 1 (3.7%)  
Time since HIV diagnosis, years (mean ± SD) 12.4 ± 6.2 11.3 ± 6.4 0.534
Duration of cART, years (mean ± SD) 10.0 ± 4.8 9.4 ± 4.7 0.691
CD4+ cell count, cells/mm3 (median (IQR) 611 (429, 853) 534 (392, 829) 0.697
Nadir CD4+ cell count, cells/mm3 (median (IQR) 148 (52, 323) 110 (52, 228) 0.392
Nadir CD4+ cell count < 200 cells/mm3 19 (70.4%) 18 (66.7%) 0.770
Current cART active against HBV 27 (100%) 27 (100%)  
cART regimen 1.000
 NNRTI-based 25 (92.6%) 25 (92.6%)  
 PI-based 2 (7.4%) 2 (7.4%)  
NRTI/NtRTI backbone 1.000
 TDF/FTC 24 (88.9%) 23 (85.2%)  
 TDF + 3TC 1 (3.7%) 1 (3.7%)  
 AZT/3TC 1 (3.7%) 2 (7.4%)  
 ABC/3TC 1 (3.7%) 1 (3.7%)  
  1. 3TC lamivudine, ABC abacavir, AZT zidovudine, cART combination antiretroviral therapy, FTC emtricitabine, IQR interquartile range, IVDU intravenous drug use, MSM men who have sex with men, NRTI nucleoside reverse transcriptase inhibitor, NNRTI non-nucleoside reverse transcriptase inhibitor, NtRTI nucleotide reverse transcriptase inhibitor, PI protease inhibitor, SD standard deviation, TDF tenofovir disoproxil fumarate