Clinical characteristics of the preterm infants
| Variables | Values |
| Female/male ratio (%) | 49/51 |
| GA (weeks), no. (%) | |
| 28–32 | 205 (47.0) |
| 32–34 | 148 (33.9) |
| 35–<37 | 83 (19.0) |
| Birth weight (g), no. (%) | |
| <1000 | 28 (6.4) |
| 1000–1500 | 196 (45.0) |
| 1500–2000 | 164 (37.6) |
| >2000 | 48 (11.0) |
| Weight for gestational age, no. (%) | |
| AGA | 242 (55.5) |
| LGA | 9 (2.1) |
| SGA | 185 (42.4) |
| Pregnancy | |
| Singleton | 260 (59.6) |
| Twins | 166 (38.1) |
| Triplets | 10 (2.3) |
| Weight for gestational age Z-score at birth, mean (SD) | −1.1 (1.0) |
| Weight for corrected age Z-score at discharge, mean (SD) | −2.5 (1.1) |
| Newborn major diagnosis, no. (%)* | |
| Neonatal infections | 214 (49.1) |
| Respiratory distress syndrome | 190 (43.6) |
| Feeding problems | 111 (25.6) |
| Perinatal asphyxia | 19 (4.4) |
| Hypothermia | 253 (58.0) |
| Anaemia | 82 (18.8) |
| Total duration of hospital stay, mean days (SD) | 21.5 (5.1) |
| Corrected age at discharge, week, mean (SD) | 35.4 (1.9) |
*The percent does not add up to 100 since the infants may have had more than one diagnosis.
.AGA, appropriate for gestational age; GA, gestational age; LGA, large for gestational age; SGA, small for gestational age.