Table I.
Baseline characteristics by group
| Variable | Overall N=3082 |
Human milk on 0% of enteral feeding days N=659 |
Human milk on 1– 50% of enteral feeding days N=766 |
Human milk on 51– 99% of enteral feeding days N=725 |
Human milk on 100% of enteral feeding days N=932 |
p |
|---|---|---|---|---|---|---|
| Gestational age (weeks) | <0.01 | |||||
| ≤28 | 20 (0.7%) | 5 (0.8%) | 6 (0.8%) | 5 (0.7%) | 4 (0.4%) | |
| 29–32 | 155 (5.0%) | 43 (6.5%) | 40 (5.2%) | 40 (5.5%) | 32 (3.4%) | |
| 33–36 | 1822 (59%) | 400 (61%) | 478 (62%) | 427 (59%) | 517 (56%) | |
| ≥37 | 1084 (35%) | 211 (32%) | 242 (32%) | 253 (35%) | 378 (41%) | |
| Birth weight <1500 g | 96 (3.1%) | 18 (2.7%) | 36 (4.7%) | 25 (3.4%) | 17 (1.8%) | <0.01 |
| SGA | 598 (19%) | 135 (21%) | 155 (20%) | 141 (19%) | 167 (18%) | 0.55 |
| Female | 1506 (49%) | 303 (46%) | 378 (49%) | 360 (50%) | 465 (50%) | 0.42 |
| Race/ethnicity | <0.01 | |||||
| White | 1622 (55%) | 349 (55%) | 368 (50%) | 382 (55%) | 523 (58%) | |
| Black | 212 (7.2%) | 74 (12%) | 48 (6.6%) | 50 (7.2%) | 40 (4.5%) | |
| Hispanic | 957 (32%) | 183 (29%) | 276 (38%) | 227 (33%) | 271 (30%) | |
| Other | 159 (5.4%) | 26 (5.3%) | 39 (5.3%) | 33 (4.8%) | 61 (6.8%) | |
| PNA at 1st feed | <0.01 | |||||
| <8 | 256 (8.3%) | 46 (7.0%) | 71 (9.3%) | 86 (12%) | 53 (5.7%) | |
| 8–14 | 1141 (37%) | 191 (29%) | 233 (30%) | 246 (34%) | 471 (51%) | |
| 15–21 | 946 (31%) | 180 (27%) | 242 (32%) | 241 (33%) | 283 (30%) | |
| >21 | 739 (24%) | 242 (37%) | 220 (29%) | 152 (21%) | 125 (13%) |
PNA = postnatal age; SGA = small for gestational age.