Revisions to Text in Results Section and Table 1

The Original Investigation titled “Association Between Year of Birth and 1-Year Survival Among Extremely Preterm Infants in Sweden During 2004-2007 and 2014-2016,” published in the March 26, 2019, issue of JAMA,¹ has 2 errors. In the Results section of the text, under the subheading “Survival Among Infants Admitted to the NICU,” the second sentence has been revised to “The proportions of 1-year survivors without any major neonatal morbidity were not significantly different between the study periods (226/497 [45%] during 2004-2007 vs 355/711 [50%] during 2014-2016; difference, −5% [95% CI,−10% to 1.3%], P = .14; Table 1).” In Table 1, under the 2 row headings “1-y Survival Without Any Major Neonatal Morbidity^f,” the 2 rows labeled “Infants admitted to NICU” have been revised to “Infant survivors at 1 y.” This article was corrected online.