| Variable | Category | N (%) or mean ± SD | Min-max |
Children (n = 280) | birth weight | <1000 g | 110 (39.3) |
|
|
| 1000 - 1499 g | 170 (60.7) |
|
| Pregnancy age | <28 Week | 98 (35.0) |
|
|
| 28 - 36 Week | 182 (65.0) |
|
| Gender | male | 142 (50.7) |
|
|
| female | 138 (49.3) |
|
| branch of insurance | Health insurance | 273 (97.5) |
|
|
| medical assistance | 7 (2.5) |
|
| polyembryony | Yes | 30 (10.7) |
|
| Birth defects | Yes | 48 (17.1) |
|
| Mechanical ventilation | Yes | 228 (79.6) |
|
| Application of alveolar surfactant drugs | Yes | 183 (65.4) |
|
| Central venous catheterization | Yes | 173 (61.8) |
|
| Total parenteral nutrition | Yes | 133 (47.5) |
|
| operation | Yes | 27 (9.6) |
|
| Number of secondary diagnoses |
| 14.1 ± 8.4 | 2.0 - 18.0 |