Comparison 13. Betamimetic versus magnesium (primary outcomes).

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Neonatal intensive care unit admission	1	137	Risk Ratio (M‐H, Fixed, 95% CI)	0.80 [0.43, 1.46]
1.1 Terbutaline versus magnesium	1	137	Risk Ratio (M‐H, Fixed, 95% CI)	0.80 [0.43, 1.46]
2 Perinatal mortality	1	50	Risk Ratio (M‐H, Fixed, 95% CI)	0.2 [0.01, 3.97]
2.1 Ritodrine versus magnesium	1	50	Risk Ratio (M‐H, Fixed, 95% CI)	0.2 [0.01, 3.97]