Figure 1. CONSORT diagram, study enrollment.
Women were classified as having a history of preeclampsia if they were admitted to a hospital with a diagnosis of preeclampsia or reported a history of preeclampsia on the second questionnaire in 1997 to 1998. Hospital admission data were available from January 1, 1991, through December 31, 2015. CONSORT = Consolidated Standards in Reporting Trials; CTS = California Teachers Study.