Overall | Hypercapnic group | |||||
---|---|---|---|---|---|---|
OR | CI 95% | p | OR | CI 95% | p | |
Age, years | 0.99 | 0.97–1.01 | 0.499 | 0.99 | 0.96–1.02 | 0.132 |
Sex (male = 1) | 1.88 | 1.04–3.31 | 0.035 | 1.70 | 0.85–3.37 | 0.633 |
APACHE II | 0.89 | 0.83–0.94 | 0.001 | 0.86 | 0.80–0.93 | 0.001 |
pH* | 1.00 | 0.97–1.03 | 0.897 | 1.01 | 0.97–1.05 | 0.499 |
PaCO2 (mm Hg) | 0.99 | 0.98–1.01 | 0.237 | 0.97 | 0.96–0.99 | 0.017 |
Decreased level of consciousness | 0.75 | 0.48–1.20 | 0.231 | 0.70 | 0.41–1.20 | 0.193 |
Overall | Hypercapnic group | |||||
---|---|---|---|---|---|---|
OR | CI 95% | p | OR | CI 95% | p | |
*pH values were multiplied for 100. The OR obtained is for pH increments of 0.01. | ||||||
†Improvement of PaCO2 and pH within 6 h after NIV initiation. | ||||||
Age, years | 1.03 | 1.00–1.05 | 0.039 | 1.03 | 0.99–1.06 | 0.102 |
Sex (male = 1) | 0.58 | 0.32–1.06 | 0.075 | 0.49 | 0.24–1.02 | 0.057 |
APACHE II | 1.09 | 1.03–1.16 | 0.003 | 1.12 | 1.04–1.20 | 0.003 |
pH* | 1.01 | 0.98–1.04 | 0.640 | 0.98 | 0.94–1.02 | 0.315 |
PaCO2 (mm Hg) | 1.00 | 0.98–1.01 | 0.612 | 1.01 | 0.99–1.03 | 0.410 |
Decreased level of consciousness | 1.55 | 0.97–2.51 | 0.067 | 1.65 | 0.93–2.91 | 0.085 |
†PaCO2 6 h | 0.44 | 0.17–1.14 | 0.091 | 0.33 | 0.97–1.13 | 0.078 |
†pH 6 h | 0.16 | 0.05–0.50 | 0.002 | 0.14 | 0.03–0.62 | 0.009 |