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Subgroup meta-analysis for AT1-AA and hypertension. Hypertension was divided into pre-eclampsia and non-gravid hypertension subgroups. Heterogeneity was reduced in each subgroup, so a fixed-effects model was used. AT1-AA = angiotensin II type 1 receptor autoantibody, CI = confidence interval, OR = odds ratio, PE = pre-eclampsia.
