Table 1.
Distribution of select characteristics among infants born late preterm or early term who died during infancy, United States, 2003–2005
| Characteristics | Late preterm (n = 7,092) % |
Early term (n = 10,007) % |
p value |
|---|---|---|---|
| Maternal | |||
| Race/ethnicity | 0.11 | ||
| Non-Hispanic white | 54.4 | 56.4 | |
| Non-Hispanic black | 23.2 | 22.7 | |
| Hispanic | 16.4 | 15.3 | |
| Asian/Pacific Islander | 3.2 | 2.8 | |
| American Indian/Alaskan Native | 1.9 | 1.8 | |
| Age (years) | <0.0001 | ||
| <20 | 15.6 | 14.5 | |
| 20–24 | 30.3 | 33.4 | |
| 25–29 | 22.8 | 23.9 | |
| 30–34 | 17.4 | 16.2 | |
| ≥35 | 13.9 | 12.0 | |
| Parity | <0.0001 | ||
| 1 | 32.9 | 30.0 | |
| 2 | 29.3 | 32.7 | |
| 3 | 19.2 | 20.4 | |
| 4 | 9.4 | 9.5 | |
| 5 | 4.2 | 3.8 | |
| ≥6 | 4.3 | 3.3 | |
| Infant | |||
| Sex | 0.66 | ||
| Male | 56.9 | 56.6 | |
| Female | 43.1 | 43.4 | |
| Plurality | <0.0001 | ||
| Singleton | 88.8 | 96.2 | |
| Twin | 11.2 | 3.9 | |
| Birth weight (g) | <0.0001 | ||
| 500–999 | 1.3 | 0.3 | |
| 1,000–1,499 | 5.6 | 1.6 | |
| 1,500–1,999 | 19.3 | 5.6 | |
| 2,000–2,499 | 34.0 | 15.6 | |
| ≥2,500 | 39.9 | 77.0 |
Percentages may not sum to 100 in each of the groups because of unknown or not stated data
Births in California, those with birthweight <500 g, and multiples greater than twin are excluded