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. 2024 Dec 12;21:E98. doi: 10.5888/pcd21.240137

Figure 1.

Of 266,146 mothers in South Carolina with at least 1 pregnancy from 2015 through 2021, we excluded 671 mothers with inconsistent age across pregnancies, defined as varying by more than ±2 years; 159 who did not have a live birth during the study period; 881 who gave birth in South Carolina but did not reside in South Carolina (331,979 of these births linked to a hospital and/or ED visit for the baby, whereas 12,963 did not); 64 mothers (100 pregnancies) with triplet and quadruplet births; 6,417 mothers (6,058 pregnancies) with twin births; and 18,357 mothers (32,440 pregnancies) who did not have full term (≥37 weeks) singleton births. The final dataset was limited to 239,597 mothers with 1 or more live, full term, singleton births (306,344 pregnancies) in South Carolina over the study period.

Flowchart of exclusion criteria for study sample, study of trends in gestational weight gain and prepregnancy obesity in South Carolina, 2015 through 2021.