Table 3.
Subgroup | Number of studies (Sample size) | Summery RR (95% CI) | Between studies |
Between subgroups |
||||
---|---|---|---|---|---|---|---|---|
I2 | P heterogeneity | Q | Q | P heterogeneity | ||||
MgSO4 regimen | ||||||||
6 g loading and 2 g/h infusion | 3 (6,592)a) | 0.84 (0.72–0.98) | 42.5% | 0.345 | 7.07 | 6.07 | 0.048 | |
4 g loading and 2 g/h infusion | 3 (1,298)b) | 1.13 (0.94–1.36) | 27.8% | 0.250 | 2.77 | |||
4 g single dose | 2 (832)c) | 0.86 (0.66–1.12) | 0.0% | 0.473 | 0.51 | |||
Gestational age (wk) | ||||||||
24 to 37 | 4 (7,654) | 0.93 (0.83–1.05) | 74.1% | 0.009 | 11.57 | 16.21 | 0.013 | |
<34 | 3 (1,842) | 0.91 (0.70–1.18) | 56.7% | 0.099 | 4.62 |