Table 1.
Distribution of clinical/epidemiological variables in our NEC cohort
| Clinical variable | Infants without NEC (n= 929) |
Infants with NEC (n=86) |
P value |
|---|---|---|---|
| Gestational age (wk) | 28 (26, 29) | 26 (25, 29) | 0.006 |
| Birth weight (BW; gram) | 1010 (790, 1263) | 890 (699, 1290) | 0.13 |
| Infants with GA<29wk | 579 (62.4%) | 61 (70.9%) | NS |
| Infants with BW <1000g | 444 (48.8%) | 50 (58.1%) | 0.067 |
| Antenatal steroid use | 781 (84.6%) | 70 (81.3%) | NS |
| Race Caucasian | 659 (71%) | 57 (66.3%) | NS |
| African American | 174 (18.7%) | 23 (26.7%) | |
| Other | 96 (10.3) | 6 (7.0%) | |
| Male gender | 479 (51.6%) | 47 (54.6%) | NS |
| Clinical Chorioamnionitis |
80 (8.6%) | 10 (11.6%) | NS |
| Type of feeding a | NS | ||
| Breast milk | 322 (55.5%) | 22 (44%) | |
| Formula milk | 106 (18.3%) | 12 (24%) | |
| Both | 152 (26.2%) | 16 (32%) | |
| Medically-treated PDAb | 293/794 (37%) | 29/72 (40.3%) | NS |
Data is represented as Median (25th, 75th centile) or as raw numbers (n) with percentages (%). For comparisons between birth weight and gestational age the Mann-Whitney U test was used. Chi-square tests were used for all other comparisons.
a
Feeding information was not available in 385 infants of the 1015 infants.
b
Data unavailable for 149 infants.