Variables | Regression coefficient β per unit increase | Category (j) | Assigned points |
---|---|---|---|
Respiratory rate at 1–2 h of NIV, breaths/min | 0.062 | < 30 | 0 |
30–34 | 1 | ||
35–39 | 2 | ||
≥ 40 | 3 | ||
Heart rate at 1–2 h of NIV, beats/min | 0.027 | < 100 | 0 |
100–119 | 1 | ||
120–139 | 2 | ||
≥ 140 | 3 | ||
pH at 1–2 h of NIV | − 15.851 | ≥ 7.35 | 0 |
7.30–7.34 | 2 | ||
7.25–7.29 | 3 | ||
7.20–7.24 | 5 | ||
< 7.20 | 8 | ||
GCS at 1–2 h of NIV | − 0.992 | 15 | 0 |
14 | 2 | ||
13 | 4 | ||
12 | 6 | ||
≤ 11 | 11 | ||
PaO2/FiO2 at 1–2 h of NIV, mmHg | − 0.005 | ≥ 150 | 0 |
101–149 | 1 | ||
≤ 100 | 2 |