Genetic polymorphisms of HLA-DP and isolated anti-HBc are important subsets of occult hepatitis B infection in Indonesian blood donors: a case-control study

Table 1 Clinical demographics of study participants (122 seropositive subjects)

Demographic	OBI	NON-OBI	P Value ^a
No. of seropositive subjects	17	105	.. .
Age, years (mean ± SD)	35.50 ± 13.52	30.92 ± 10.73	0.136
No. of male subjects (%)	14 (82.35)	87 (82.85)	0.959
Anti-HBs, mIU/mL (mean ± SEM)	339.1 ± 132.2	451.7 ± 103.6	0.670
Anti-HBc, s/CO (mean ± SEM)	4.054 ± 1.031	2.885 ± 0.350	0.227
Categories of seropositive subjects
a. Anti-HBs <500 mIU/mL (%) b. Anti-HBs ≥500 mIU/mL (%) c. Isolated anti-HBc ^b (%)	6 (7.60) 6 (23.08) 5 (29.41)	73 (92.40) 20 (76.92) 12 (70.59)	0.014

Abbreviations: SD standard deviation, SEM standard error of mean
^aBold indicates statistically significant
^bIsolated anti-HBc is defined by samples that were positive for anti-HBc (≥1.0 s/CO) but negative for anti-HBs (<10.0 mIU/mL)

ISSN: 1743-422X