Table 4. Comparison of discharge outcomes.
| Variables | Period 1 (n=37) | Period 2 (n=50) | Period 3 (n=37) | P value |
|---|---|---|---|---|
| Duration of hospitalization (day) | 76.8±29.5 | 68.9±21.4 | 61.1±20.3 | 0.029 |
| PCA at discharge (wk) | 40+4±2+6 | 38+5±2+2 | 38+1±1+4 | 0.000 |
| Necrotizing enterocolitis | 0 (0) | 2 (4.0) | 0 (0) | 0.222 |
| Bronchopulmonary dysplasia | 5 (13.5) | 6 (12.0) | 4 (10.8) | 0.938 |
| Retinopathy of prematurity | 1 (2.7) | 2 (4.0) | 1 (2.7) | 0.923 |
| IVH, grade≥3 | 1 (2.7) | 5 (10.0) | 4 (10.8) | 0.356 |
| Periventricular leukomalacia | 1 (2.7) | 4 (8.0) | 6 (16.2) | 0.119 |
| Cholestasis | 7 (18.9) | 10 (20.0) | 4 (10.8) | 0.491 |
| Sepsis | 16 (43.2) | 17 (34.0) | 13 (35.1) | 0.649 |
Values are presented as mean±standard deviation or number (%).
P values were determined using the chi-square test or Kruskal-Wallis test as appropriate.
PCA, postconceptional age; IVH, intraventricular hemorrhage.