Correlation between cytokine concentrations and clinical variables (Spearman rank correlation showing rs (P value))
| TNF-a | IL-1β | IL-6 | IL-8 | |
|---|---|---|---|---|
| Gestational age | −0.42 (0.0002) | −0.29 (0.027) | −0.41 (0.003) | −0.32 (0.026) |
| Birthweight | −0.15 (0.093) | −0.05 (0.70) | −0.18 (0.18) | 0.04 (0.78) |
| Time with supplemental oxygen | 0.29 (0.018) | 0.07 (0.61) | 0.36 (0.01) | 0.18 (0.12) |
| Duration of mechanical ventilation | 0.36 (0.024) | 0.12 (0.37) | 0.42 (0.003) | 0.21 (0.10) |
| Maximal peak inspiratory pressure | −0.01 (0.92) | −0.36 (0.96) | 0.14 (0.31) | 0.25 (0.04) |
| Time of appearance of air leak | 0.27 (0.082) | 0.25 (0.09) | 0.20 (0.03) | 0.18 (0.098) |