Table 8.

IMR by Birth Weight and Race of Mother, United States, 1996, and Percent Change 1985–1996

Birth Weight (g)IMRPercent Change, 1985–1996*
All RacesWhiteBlackAll RacesWhiteBlack
Total7.36.114.1−31.7−33.7−24.0
 <250062.957.578.7−34.8−38.7−24.0
 <1500259.3249.0280.4−35.1−39.0−27.3
 <500889.0892.1886.0−3.2−3.8−2.0
  500–749512.4528.0485.8−32.9−32.7−33.4
  750–999167.2176.9145.7−58.6−59.4−58.0
  1000–124977.279.371.6−60.0−62.8−51.8
  1250–149952.755.646.5−51.6−54.7−42.8
  1500–199930.330.429.4−44.3−47.9−35.3
  2000–249913.413.313.8−35.5−37.8−28.0
 ≥25002.82.54.2−35.7−35.9−33.9
  2500–29995.14.96.0−34.2−36.0−30.6
  3000–34992.72.53.7−38.1−38.5−35.7
  3500–39991.91.73.4−34.5−34.6−24.4
  4000–44991.71.53.2−39.3−40.0−38.5
 ≥45002.52.2§−51.0−50.0§
  • * Percent change from 1985–1996 was computed based on unweighted and unimputed birth weight data for 1996, because comparable weighted and imputed birth weight data were not available for 1985.

  • Includes races other than white and black.

  • IMRs from the linked file differ slightly from those based on unlinked data (Tables 6, 7), because the linked file uses the self-reported race of mother from the birth certificate, whereas the unlinked data uses the race of the decedent as reported by the funeral director on the death certificate.

  • § Figure does not meet standard of reliability or precision.

    Source: National Center for Health Statistics, Linked Birth/Infant Death Dataset—1996 Period Data.