Table 5 Comparison of postoperative hypoxemia rates for the 2012 and 2015 patient cohorts
2012 | 2015 | p value | |
|---|---|---|---|
Patients | 500 | 1000 | |
Postoperative hypoxemia | 128 (25.6%) | 181 (18.1%) | 0.0007 |
Preoperative risk | |||
Age | 54 ± 17 | 57 ± 17 | 0.0021 |
Age ≥ 75 years | 62 (12.4%) | 186 (18.6%) | 0.0023 |
ASA classification | 2.8 ± 0.7 | 2.9 ± 0.6 | 0.0323 |
ASA classification 3 or 4 | 359 (71.8%) | 771 (77.1%) | 0.0248 |
Emergency procedures | 36 (7.2%) | 87 (8.7%) | 0.3182 |
Preexisting lung disease | 69 (13.8%) | 153 (15.3%) | 0.4406 |
Weight (kg) | 86 ± 24 | 86 ± 24 | 0.9357 |
Intraoperative risk | |||
Operating room minutes | 129 ± 77 | 128 ± 73 | 0.8031 |
Glycopyrrolate on induction | 119 (23.8%) | 248 (24.8%) | 0.6711 |
Fluid input (L) | 1.8 ± 1.2 | 1.5 ± 1.0 | 0.0001 |