Table 4. Sensitivity analysis of the effects of maternal pre-pregnancy overweight and obesity on offspring mental health.

	No. of studies	Overall effect(95%CI)	P	I2
Study design
Prospective	24	1.24(1.19,1.29)	<0.001	72.5%
Retrospective	6	1.22(1.14,1.30)	<0.001	67.4%
Case–Control	5	1.30(1.13,1.48)	<0.001	68.8%
Quality grade of study
High (NOS≥6)	30	1.24(1.20,1.28)	<0.001	73.1%
Low (NOS<6)	5	1.19(1.05,1.35)	0.008	19.9%

Note: NOS, Newcastle–Ottawa Quality Assessment Scale.