Studies Assessing the Effect of Maternal HBV Sero-status on Persistence/Prevalence of HBeAg in a Systematic Review, up to 2012.

Abbreviations: ALT, alanine transaminase; CC, case-control study; CI, confidence interval; Co, cohort study; CS, cross-sectional study; HBeAg, hepatitis B e antigen; HBsAg, hepatitis B surface antigen; HCC, hepatocellular carcinoma; HR, hazard ratio; N/R, not reported; OR, odds ratio; RR, risk ratio.
aWhen age range was not available, study was categorized as children (<20 years old), adults (≥20 years old) or both children and adults.
bOdds ratios for case-control or cross-sectional studies and risk ratios for cohort studies are presented.
cExcept for the study of Tseng et al. [28] which presented hazard ratios, odds ratios are presented.
dWhen the measurement of maternal sero-status was performed is not known.
eMultivariable model included maternal HBsAg, maternal HBeAg, peak ALT and HBV genotype.
fAs a contingency table contains a zero cell, 0.5 was added to each cell.
gAdjusted for age.
hThe author provided the raw data to compute odds ratio.