Table 2 Quality assessment of studies of calcium supplementation during pregnancy to prevent stillbirths from maternal hypertensive disorders:
From: Impact of interventions to prevent and manage preeclampsia and eclampsia on stillbirths
Quality Assessment | Directness | Summary of findings | ||||||
|---|---|---|---|---|---|---|---|---|
No. of studies (Ref) | Design | Limitations | Consistency | Generalizability to Population of Interest | Generalizability to intervention of Interest | Events in intervention group | Events in control group | Relative Risk ( 95 % CI) |
Stillbirth: Moderate outcome specific quality | ||||||||
3 | RCT | None | Consistent (I2 =0) | Yes all from developing countries | Dose of calcium supplementation ranged from 1.5-2 g/day in all the included studies | 117 | 145 | 0.81 (0.63-1.03)a |
Perinatal mortality: Low outcome specific quality | ||||||||
4 | RCTs | None | Consistent (I2 =0) | Yes All from developing countries | Dose of calcium supplementation ranged from 1.5-2 g/day in all the included studies | 154 | 179 | 0.86 (0.70-1.07)a |