Table 1 Host conditions
Age (years) | 54.2 ± 17 |
Male | 197 (39.4%) |
Female | 303 (60.6%) |
Esophagogastric dysfunction | 170 (34.1%) |
Gastric dysmotility | 54 (10.8%) |
Intestinal dysmotility | 15 (3.0%) |
Abdominal hypertension | 63 (12.6%) |
Eating within 6Â hours of surgery | 16 ( 3.2%) |
Pre-existing lung disease | 69 (13.8%) |
Acute trauma | 37 ( 7.4%) |
Pre-operative FiO 2 : | Â |
      room air | 425 (85.0%) |
low-flow nasal cannula | 63 (12.6%) |
  no documentation | 12 ( 2.4%) |
Pre-operative SpO 2 (%) | 97.7 ± 1.9 |
Pre-operative respiratory rate (bpm) | 18.1 ± 1.9 |
Height (feet) | 5.5 ± 0.4 |
Weight (kilograms) | 86.2 ± 24.3 |