Summary risk estimates of the association between maternal ever parity and CHD risk in offspring.

1p-value for heterogeneity within each subgroup. 2p-value for heterogeneity between subgroups with meta-regression analysis. Abbreviations: RR: relative risk; CI: confidence interval. Summary risk estimates of the association between maternal ever parity and CHD risk in offspring.1. 各亚组内异质性检验的p值 2. 采用Meta回归分析得到的亚组间异质性检验的p值 缩写说明：RR代表相对风险（relative risk），CI代表置信区间（confidence interval）。 本数据集为母亲经产次与子代先天性心脏病（CHD）发病风险之间关联的汇总风险估计值。