Table 4.

Heterogeneity and publication bias in studies of serum apelin, chemerin and omentin in women with GDM

			Heterogeneity test			Egger’s test		Begg’s test
Adipokine in GDM	N	SMD (95% CI)	I2	P	t	P	z	P
Apelin in GDM	6	0.43 (−0.40 to 1.26)	94.5	< 0.001	1.66	0.17	0.94	0.35
Chemerin in GDM	14	0.77 (−0.07 to 1.61)	98.0	< 0.001	0.03	0.98	1.26	0.21
Omentin in GDM	10	−0.72 (−1.26 to − 0.19)	90.8	< 0.001	−1.73	0.12	−1.70	0.09

N Number of studies, SMD Standardized mean difference