Table 4.
Differences of survival rate among regions or between hospitals.
| Regional economic development | Hospital categories | ||||||
|---|---|---|---|---|---|---|---|
| Low-level | Middle-level | High-level | p-value | Specialist hospitals | General hospitals | p-value | |
| NICUs, n | 5 | 10 | 11 | – | 7 | 19 | – |
| ELBW infants, n | 352 | 728 | 1495 | – | 1068 | 1507 | – |
| BW (grams), median (IQR) | 885 (800, 950) | 900 (813, 960) | 890 (790, 950) | – | 880 (790, 950) | 900 (800, 950 | – |
| Survived, n (%) | 175 (49.72) | 400 (54.95) | 844 (56.45) | < 0.05* | 642 (60.11) | 777 (51.56) | < 0.001# |
| Died under active treatment, n (%) | 69 (19.60) | 93 (12.77) | 226 (15.12) | – | 133 (12.45) | 255 (16.92) | – |
| Died after treatment withdrawal, n (%) | 108 (30.68) | 235 (32.28) | 425 (28.43) | – | 293 (27.43) | 475 (31.52) | – |
NICUs, Neonatal intensive care units; ELBW, extremely low birth weight; IQR, interquartile range.
*Chi-square test linear-by-linear association.
#Pearson’s Chi-square test.