. Author manuscript; available in PMC: 2010 Jan 4.

Published in final edited form as: J Perinatol. 2008 Aug 21;29(1):57–62. doi: 10.1038/jp.2008.117

Table 2.

Results from proportional hazards models for time to NEC or death

Variable	Hazard ratio	95% confidence interval	P-value
Model 1^a
Cumulative volume of HM (ml kg^–1) days 1–14 (per 100 ml kg^–1)	0.87	0.77, 0.97	0.015
Model 2
Proportion of HM to total feeds days 1–14 (per 10% increase)	0.83	0.72, 0.96	0.015
Model 3
Receiving 100% HM to total enteral feeds days 1–14	0.85	0.60, 1.19	0.34

Abbreviation: HM, human milk.

Each model controls for birth weight, small for gestational age, race, PDA, antenatal steroids, duration of mechanical ventilation, and center.

Among infants who received some HM days 1–14 of life.