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. 2023 Mar 24;192(8):1249–1263. doi: 10.1093/aje/kwad071

Figure 1.

Figure 1

Environmental Influences on Child Health Outcomes (ECHO) participants are enrolled before or during pregnancy (n = 21,357) or at or after birth (n = 8,914), United States. There are 2,488 pregnancies for which a child has not yet been enrolled in the ECHO-Wide Cohort Data Collection Protocol (EWCP). In total, 29,622 children were enrolled in the EWCP as of March 4, 2022. This figure includes participants who were enrolled in the EWCP from 2018 to March 4, 2022. Enrollment in the EWCP is ongoing.