Learning cohort (northern) N = 405 | Validating cohort (southern) N = 353 | |||||||
---|---|---|---|---|---|---|---|---|
P value | Hazard ratio | 95% CI for HR | P value | Hazard ratio | 95% CI for HR | |||
Lower | Upper | Lower | Upper | |||||
Surfactant protein D (≥85th percentile in “learning cohort,” ≥525.6 ng/mL vs. <525.6 ng/mL) | 0.0053 | 0.60 | 0.42 | 0.86 | 0.046 | 0.64 | 0.42 | 0.99 |
Club cell secretory protein 16 (≥85th percentile in “learning cohort,” ≥42.8 ng/mL vs. <42.8 ng/mL) | 0.50 | 0.89 | 0.66 | 1.22 | 0.81 | 0.96 | 0.67 | 1.37 |
PaO2/FiO2 (Q1 vs. Q2–Q4) | 0.017 | 0.73 | 0.57 | 0.95 | 0.89 | 0.98 | 0.73 | 1.32 |
Apache II score (per score unit increase) | 0.031 | 0.986 | 0.974 | 0.999 | 0.041 | 0.981 | 0.964 | 0.999 |
Age (per year increase) | 0.84 | 1.00 | 0.992 | 1.010 | 0.17 | 0.993 | 0.984 | 1.003 |
Severe sepsis/Septic shock (vs. milder or no infection) | 0.0014 | 0.66 | 0.51 | 0.85 | 0.0019 | 0.63 | 0.48 | 0.85 |
Charlson’s comorbidity index ≥2 vs. <2 | 0.046 | 1.29 | 1.00 | 1.67 | 0.58 | 1.08 | 0.81 | 1.46 |
Chronic obstructive pulmonary disease (yes vs. no) | 0.36 | 0.87 | 0.64 | 1.18 | 0.71 | 0.94 | 0.67 | 1.31 |
Gender (male vs. female) | 0.82 | 0.97 | 0.77 | 1.23 | 0.97 | 1.01 | 0.77 | 1.32 |
Estimated glomerular filtration rate (per ml) | 0.61 | 1.00 | 0.999 | 1.002 | 0.048 | 1.001 | 0.998 | 1.004 |