IMR and NMR by Birth Weight and Race of Mother, 2001 Linked File, and Percentage Change in Birth Weight–Specific IMR, 1995–2001 Linked Files: United States
| Birth Weight (g) | IMR† | NMR‡ | % Change in IMR 1995–2001 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| All Races* | Non-Hispanic White | Black | Hispanic | All Races* | Non-Hispanic White | Black | Hispanic | ||
| Total | 6.8 | 5.7 | 13.3 | 5.4 | 4.5 | 3.8 | 8.9 | 3.6 | −10.5 |
| <2500 | 58.6 | 52.2 | 75.7 | 54.9 | 47.6 | 43.3 | 59.8 | 44.7 | −9.3 |
| <1500 | 244.4 | 229.4 | 270.1 | 231.8 | 213.8 | 205.7 | 228.7 | 203.0 | −8.9 |
| <500 | 855.0 | 872.3 | 847.5 | 812.5 | 838.1 | 859.2 | 827.8 | 792.3 | −5.4 |
| 500–749 | 476.8 | 494.5 | 453.5 | 478.6 | 411.1 | 438.5 | 374.0 | 420.7 | −9.7 |
| 750–999 | 154.1 | 156.6 | 150.3 | 148.6 | 115.9 | 127.7 | 95.9 | 113.6 | −15.4 |
| 1000–1249 | 73.8 | 77.0 | 68.3 | 72.1 | 50.0 | 57.6 | 38.1 | 48.8 | −13.7 |
| 1250–1499 | 45.6 | 43.5 | 42.4 | 53.4 | 34.0 | 34.3 | 27.2 | 40.3 | −16.5 |
| 1500–1999 | 27.2 | 26.8 | 25.8 | 30.5 | 17.4 | 17.8 | 14.1 | 20.9 | −18.1 |
| 2000–2499 | 11.3 | 10.8 | 11.3 | 12.3 | 6.0 | 6.2 | 4.7 | 7.2 | −16.3 |
| ≥2500 | 2.4 | 2.3 | 3.8 | 1.9 | 0.9 | 0.8 | 1.1 | 0.7 | −20.0 |
| 2500–2999 | 4.5 | 4.6 | 5.4 | 3.6 | 1.7 | 2.0 | 1.6 | 1.4 | −16.7 |
| 3000–3499 | 2.3 | 2.2 | 3.3 | 1.8 | 0.8 | 0.8 | 0.9 | 0.7 | −20.7 |
| 3500–3999 | 1.7 | 1.5 | 3.1 | 1.3 | 0.5 | 0.5 | 0.9 | 0.5 | −15.0 |
| 4000–4499 | 1.5 | 1.4 | 2.7 | 1.3 | 0.5 | 0.5 | § | 0.4 | −16.7 |
| ≥4500 | 2.4 | 1.9 | 6.2 | 2.3 | 1.4 | 0.9 | § | § | −14.3 |
IMRs and NMRs by race from the linked file differ slightly from those based on unlinked data because the linked file uses the self-reported race of mother from the birth certificate, whereas the unlinked data use the race of child as reported by the funeral director on the death certificate. Race and Hispanic origin are reported separately on birth certificates. People of Hispanic origin may be of any race. In this table, Hispanic women are classified only by place of origin; non-Hispanic women are classified by race.
Source: Centers for Disease Control and Prevention/NCHS, 1995 and 2001 Period Linked Birth/Infant Death Data Sets.
↵* Includes races other than white and black.
↵† IMR are infant deaths during a year per 1000 live births in specified group.
↵‡ NMR are deaths of infants 0–27 days of age per 1000 live births in specified group.
↵§ Figure does not meet standards of reliability or precision.