Table 1 Selection criteria for primary studies to enter the present meta-analysis
P (Population) | E (Exposure) | C (Comparison) | O (Outcomes) | T (Type of Studies) |
|---|---|---|---|---|
The target population included all pregnant women without any restrictions | The intended exposure or cause was the presence of infection or hepatitis B virus in pregnant women | The comparison group included healthy pregnant women without hepatitis B infection | The intended Outcomes included neonatal death, miscarriage, eclampsia or preeclampsia, preterm birth, gestational diabetes, and other outcomes reported in selected cohort studies | The type of studies included only cohort studies |