Baseline surfactant protein levels and mortality among patients with ALI/ARDS
| Alive | Dead | ||||
|---|---|---|---|---|---|
| Time | n | Median (IQR) surfactant protein level | n | Median (IQR) surfactant protein level | p value* |
| For each group (alive or dead), the number of subjects (n) and median (25–75th IQR) are presented. | |||||
| *Bivariate analysis using the Wilcoxon test. | |||||
| SP-A=surfactant protein A; SP-D=surfactant protein D; IQR=25–75th interquartile range. | |||||
| SP-A (ng/ml) | 370 | 30 (14–65) | 195 | 29 (14–60) | 0.69 |
| SP-D (ng/ml) | 370 | 73 (33–143) | 195 | 101 (43–219) | 0.013 |