TABLE 1.

Meta‐analysis of randomised control trials of gestational diabetes mellitus

Reference	Number of RCT	Sample IG/CG	Number of cases IG/CG	Type of measure (RR or OR)	RR/OR and 95% CI of the largest study	RR/OR and 95% CI	I 2 (%)
Aune et al. 24	12	2015/2030	129/191	RR	0.78 (0.47–1.28)	0.69 (0.50–0.96)	30.2
Bennett et al. 49	9	1736/1260	111/135	RR	0.70 (0.49–0.99)	0.65 (0.50–0.78)	0
Da Silva et al. 93	11	1673/1689	NR	RR	0.70 (0.49–0.99)	0.67 (0.49–0.92)	33
Davenport et al. 21	27	3505/3429	271/380	OR	0.62 (0.40–0.98)	0.62 (0.52–0.75)	0
Di Mascio et al. 56	4	836/850	20/50	RR	NR	0.41 (0.24–0.68)	NR
Díaz‐Burrueco et al. 50	10	1159/1516	123/204	OR	NR	0.65 (0.43–0.98)	48
Guo et al. 51	19	Total:5883	NR	RR	0.54 (0.37–0.79)	0.70 (0.59–0.84)	14.9
Han et al. 18	3	437/389	30/24	RR	1.21 (0.67–2.18)	1.10 (0.66–1.84)	0
Magro‐Malosso et al. 57	7	748/602	40/53	RR	NR	0.61 (0.41–0.90)	NR
Ming et al. 53	8	1472/1509	88/144	RR	0.70 (0.49–0.99)	0.58 (0.37–0.90)	46
Muhammad et al. 54	6	314/318	73/101	RR	0.54 (0.37–0.79)	0.78 (0.51–1.19)	49
Nasiri‐Amiri et al. 58	8	727/714	143/196	RR	0.67 (0.47–0.96)	0.76 (0.56–1.03)	50
Rogozinska et al. 26	27	3153/3015	240/347	OR	NR	0.66 (0.53–0.83)	0
Russo et al. 59	10	1715/1686	116/159	RR	0.70 (0.49–0.99)	0.74 (0.57–0.97)	12
Sanabria et al. 15	8	1434/1439	NR	RR	NR	0.69 (0.52–0.91)	0
Doi et al. 55	11	722/745	100/148	RR	0.54 (0.37–0.79)	0.69 (0.51–0.94)	23.2
Song et al. 60	10	Total: 4161	NR	RR	0.94 (0.59–1.50)	0.77 (0.54–1.09)	38
Xing et al. 61	10	794/786	NR	RR	1.30 (0.93. 1.82)	0.71 (0.48–1.04)	63.1
Yin et al. 17	5	497/450	34/34	RR	1.21 (0.67–2.18)	0.91 (0.57–1.44)	26
Yu et al. 62	6	651/719	117/181	OR	0.62 (0.40–0.98)	0.59 (0.39–0.88)	46
Zheng et al. 63	5	550/583	116/168	OR	0.62 (0.40–0.98)	0.62 (0.43–0.89)	37

Abbreviations: CG, control group; IG, intervention group; OR, odds ratio; RCT, randomised controlled trial; RR, relative risk.