Table 3 Multifactor Cox proportional hazards model in the matched cohort
Variables | β | S.E | Z | P | HR (95%CI) |
|---|---|---|---|---|---|
Group | |||||
 IMV |  |  |  |  | 1.00 (Reference) |
 NIV | -0.27 | 0.07 | -4.14 | < 0.001 | 0.76 (0.67 ~ 0.87) |
Respiratory rate (bpm) | 0.06 | 0.01 | 7.44 | < 0.001 | 1.06 (1.04 ~ 1.08) |
Spo2(%) | -0.08 | 0.01 | -9.91 | < 0.001 | 0.92 (0.91 ~ 0.94) |
SAPS II | 0.03 | 0.00 | 13.11 | < 0.001 | 1.03 (1.02 ~ 1.03) |