Comparison 9. Ginger versus vitamin B6.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Nausea vomiting score day 3	2	251	Std. Mean Difference (IV, Fixed, 95% CI)	−0.00 [−0.25, 0.25]
1.1 Rhodes Index	1	123	Std. Mean Difference (IV, Fixed, 95% CI)	−0.09 [−0.44, 0.27]
1.2 10 cm VAS	1	128	Std. Mean Difference (IV, Fixed, 95% CI)	0.08 [−0.27, 0.43]
2 Post-treatment number of vomiting episodes: day 3	1	128	Mean Difference (IV, Fixed, 95% CI)	Not estimable
3 No improvement in symptoms	2	360	Risk Ratio (M-H, Random, 95% CI)	0.84 [0.47, 1.52]
4 Spontaneous abortion	2	360	Risk Ratio (M-H, Fixed, 95% CI)	0.49 [0.17, 1.42]
5 Stillbirth	1	291	Risk Ratio (M-H, Fixed, 95% CI)	0.14 [0.01, 2.72]
6 Congenital abnormality	1	291	Risk Ratio (M-H, Fixed, 95% CI)	0.50 [0.13, 1.95]
7 Antepartum haemorrhage/abruption, placenta praevia	1	291	Risk Ratio (M-H, Fixed, 95% CI)	0.99 [0.29, 3.36]
8 Pregnancy-induced hypertension	1	291	Risk Ratio (M-H, Fixed, 95% CI)	1.24 [0.34, 4.53]
9 Pre-eclampisa	1	291	Risk Ratio (M-H, Fixed, 95% CI)	1.49 [0.43, 5.17]
10 Preterm birth	1	291	Risk Ratio (M-H, Fixed, 95% CI)	1.66 [0.40, 6.80]
11 Arrhythmia	1	123	Risk Ratio (M-H, Fixed, 95% CI)	3.05 [0.13, 73.40]
12 Headache	1	123	Risk Ratio (M-H, Fixed, 95% CI)	0.20 [0.01, 4.15]
13 Heartburn	2	251	Risk Ratio (M-H, Fixed, 95% CI)	2.35 [0.93, 5.93]
14 Sedation or drowsiness	2	251	Risk Ratio (M-H, Fixed, 95% CI)	0.75 [0.48, 1.19]
15 Caesarean delivery	1	69	Odds Ratio (M-H, Fixed, 95% CI)	0.60 [0.15, 2.36]