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Birth weight aggregate group NMR comparisons: Colorado, 1991–1996 vs 1997–2003
| Birth weight aggregate | 1991–1996 | 1997–2003 | P-value |
|---|---|---|---|
| NMR (per 1000 births) | NMR (per 1000 births) | ||
| >2500 | 1.0 | 0.9 | 0.07 |
| >1500 | 1.6 | 1.4 | <0.01 |
| >1000 | 2.0 | 1.6 | <0.01 |
| >750 | 2.4 | 2.0 | <0.1 |
| >600 | 2.8 | 2.5 | 0.02 |
| >500 | 3.3 | 3.1 | 0.15 |
| >300 | 4.1 | 4.0 | 0.67 |
| Overall | 4.3 | 4.4 | 0.42 |
Abbreviation: NMR, neonatal mortality rate.
