Preterm births are the second leading cause of death among children younger than five. The percentage of babies born preterm can be reduced through early intervention. The most effective interventions at improving infant survival rates are those that support the pregnant parent right before, during, and after the pregnancy. These can ensure that complications often associated with preterm delivery, such as infection, neurological challenges, and lung immaturity, are treated early.
Data for the State of Babies Yearbook: 2022 were calculated using data from CDC Wonder. The numerator is the number of infants born preterm, which is defined by the CDC as births before 37 completed weeks of gestation. The denominator is the total number of infants whose completed weeks of gestation is known.This indicator can be disaggregated by the race/ethnicity and urbanicity. Race/ethnicity: CDC Wonder contains very detailed information on the pregnant parent’s race/ethnicity. After examining sample sizes, we are presenting the following subgroups: non-Hispanic American Indian or Alaska Native, non-Hispanic Asian, non-Hispanic Black, non-Hispanic more than one race, non-Hispanic native Hawaiian or other Pacific islander, non-Hispanic White, and Hispanic of all races. The Division of Vital Statistics of the National Center for Health Statistics includes births with origin of the pregnant parent not stated with non-Hispanic births, according to the race of the pregnant parent in their reported statistics. We have excluded births with unknown Hispanic origins. The total/national average by race and ethnicity is out of states whose data is presented for that subgroup, rather than all states. Urbanicity: CDC Wonder classifies each pregnant parent as living in a metro (urban) or non-metro area according to 2013 designations. The metro group includes counties in these categories: large central metro, large fringe metro, medium metro, and small metro. The non-metro group includes counties in these categories: micropolitan (non-metro) and noncore (non-metro). For the subgroups, the total/national average is out of states whose data is presented for that subgroup, rather than all states.
World Health Organization. (2015). WHO recommendations on interventions to improve preterm birth outcomes. https://www.who.int/reproductivehealth/publications/maternal_perinatal_health/preterm-birth-guideline/en/ World Health Organization. (2015). WHO recommendations on interventions to improve preterm birth outcomes. https://www.who.int/reproductivehealth/publications/maternal_perinatal_health/preterm-birth-guideline/en/
United States Department of Health and Human Services (US DHHS), Centers for Disease Control and Prevention (CDC), National Center for Health Statistics (NCHS), Division of Vital Statistics. (2020). Natality public-use data 2019, on CDC WONDER Online Database, October 2020. http://wonder.cdc.gov/natality-expanded-current.html