“…While a few US‐based studies have reported differences in the prevalence of CHD across states and regions, little is known about larger, national trends (Ferencz et al ; Fixler, Pastor, Chamberlin, Sigman, & Eifler, ; Mayberry, Scott, & Goldberg, ; Reller, Strickland, Riehle‐Colarusso, Mahle, & Correa, ; Wilson, Correa‐Villasenor, Loffredo, & Ferencz, ). Also, recent prevalence reports have classified CHD by severity rather than by shared anatomical features (Gilboa et al ; Pfitzer et al ; Warnes et al ). Presenting geographic trends by phenotype can guide future investigations of epigenetic risk factors for particular types of CHD.…”