Table 4.

Subgroup analysis of infection during pregnancy and the risk of AR

	OR(95%CI)	P	Heterogeneity
Total studies	1.34 (1.08–1.67)	0.008	85%	P < 0.001
Study type
Cohort study	1.14(1.10–1.18)	< 0.001	0%	0.42
Non-cohort study	2.37 (1.00–5.65)	0.05	84%	P < 0.001
Outcome evaluation
Doctor's diagnosis	1.38 (1.06–1.81)	0.02	92%	P < 0.001
Self-report	1.27 (0.91–1.78)	0.16	0%	0.34