title: Decrease in infant mortality in New York City after 1989.
abstract: OBJECTIVE
  This study identified factors contributing to the rapid decline in infant mortality in New York City from 1989 to 1992.
  
  
  METHODS
  Changes in birthweight distributions and in birthweight/age-, cause-, and birthweight/age/cause-specific mortality rates from 1988/89 (before the mortality reduction) to 1990/91 were identified from New York City vital statistics data.
  
  
  RESULTS
  Infant, neonatal, and postneonatal mortality of very-low-birthweight (< 1500 g) and normal-birthweight infants decreased significantly. The declines were almost entirely due to decreases in birthweight-specific mortality rates, rather than increased birthweights. All races experienced most of these reductions. Mortality decreased significantly for 6 causes of death. These decreases were consistent with the birthweight/age groups experiencing mortality declines.
  
  
  CONCLUSIONS
  Widespread, multiple perinatal and postnatal factors contributed to the decline in infant mortality.
authors.affiliation: Bureau of Maternity Services and Family Planning, New York City Department of Health, NY, USA. hkalter@jhsph.edu
authors.forename: H D
authors.initials: HD
authors.lastname: Kalter
authors.forename: Y
authors.initials: Y
authors.lastname: Na
authors.forename: P
authors.initials: P
authors.lastname: O'Campo
mesh_terms: D001724:Birth Weight; D044383:Black People; D002423:Cause of Death; D003644:Death Certificates; D006801:Humans; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D019102:Infant, Very Low Birth Weight; D009519:New York City / Q000453:epidemiology; D044465:White People; D001741:Black or African American