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Table 6 Perioperative pulmonary aspiration (POPA) associations

From: Evaluation of operating room reverse Trendelenburg positioning and its effect on postoperative hypoxemia, aspiration, and length of stay: a retrospective study of consecutive patients

  POPA (No) POPA (Yes) p value
Patients 1448 (96.5%) 52 (3.5%) 95% CI: 2.7–4.5%  
Adverse outcomes
 Mortality 5 (0.4%) 4 (7.7%) 0.0004
 Postoperative length of stay (days) 2.3 ± 3.0 8.8 ± 6.7 < 0.0001
Preoperative risk
 Age 60 ± 17 64 ± 18 0.0012
 Age ≥ 75 years 230 (15.9%) 18 (34.6%) 0.0004
 ASA classification 2.8 ± 0.6 3.1 ± 0.6 0.0004
 ASA classification 3 or 4 1084 (74.9%) 46 (88.5%) 0.0254
 Emergency procedures 113 (7.8%) 10 (19.2%) 0.0032
 Preexisting lung disease 210 (14.5%) 12 (23.1%) 0.0871
 Weight (kg) 86 ± 24 82 ± 24 0.1397
Intraoperative risk
 Operating room minutes 126 ± 71 190 ± 114 0.0002
 Glycopyrrolate on induction 354 (24.5%) 13 (25.0%) 0.9274
 Fluid input (L) 1.6 ± 0.9 2.9 ± 2.4 0.0003
  1. ASA American Society of Anesthesiologists, CI confidence interval