Table 2.
Correlation of constant parameters with the VEGF concentration in tracheal aspirates of 57 infants
| Parameter | p-value | |
|---|---|---|
| Gestational age (postmenstrual age in weeks, mean ± standard deviation) | 27.5 ± 4.2 | 0.9230 |
| Birth weight (g, mean ± standard deviation) | 1128 ± 839 | 0.6718 |
| Bronchopulmonary dysplasia (n) | 34 (60%) | 0.3076 |
| Asphyxia (n) | 7 (12%) | 0.4642 |
| Intraventricular hemorrhage (all grades) | 16 (28%) | 0.2607 |
| Cerebral hemorrhage (intraventricular, cerebellar, n) | 17 (30%) | 0.2782 |
| Respiratory distress syndrome (n) | 50 (88%) | 0.7636 |
| Maximal grade of respiratory distress syndrome (RDS) | 0.4284 | |
| No RDS (n) | 7 (12%) | |
| Grade 1 (n) | 6 (11%) | |
| Grade 2 (n) | 18 (32%) | |
| Grade 3 (n) | 20 (35%) | |
| Grade 4 (n) | 6 (11%) | |
| Survival (n) | 49 (86%) | 0.8802 |
| Antenatal corticosteroids for lung development (complete, n) | 32 (56%) | 0.9443 |
| Maternal infection (n) | 23 (40%) | 0.4403 |
| Premature rupture of the membranes (n) | 8 (14%) | 0.2180 |
| Small for gestational age (n) | 15 (26%) | 0.4428 |
| Number of days with infection (median, range) | 11 (0–80) | 0.7470 |
| Retinopathy of prematurity (n) | 34 (60%) | 0.9268 |
| Maximal grade of Retinopathy of prematurity (RPM) | 0.6947 | |
| No RPM | 23 (40%) | |
| Stage 1 (n) | 4 (7%) | |
| Stage 2 (n) | 16 (28%) | |
| Stage 3 (n) | 14 (25%) | |
| Stage 4 (n) | 0 | |
| Stage 5 (n) | 0 |