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Table 7 Perioperative aspiration comparison of 2015 cohort with documented procedure RTP to 2012 cohort

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

  RTP (↓) (2012) RTP (Yes) (2015) p value
Total 500 (74.1%) 175 (25.9%)  
Perioperative aspiration 24 (4.8%) 1 (0.6%) 0.0088
Preoperative risk
 Age 54 ± 17 56 ± 17 0.2310
 ASA classification 2.8 ± 0.6 2.9 ± 0.6 0.822
 Emergency procedures 36 (7.2%) 5 (2.9%) 0.0384
 Preexisting lung disease 69 (13.8%) 41 (23.4%) 0.0030
 Weight (kg) 86 ± 24 89 ± 23 0.1571
Intraoperative risk
 Operating room minutes 129 ± 77 126 ± 61 0.5225
 Glycopyrrolate on induction 119 (23.8%) 48 (27.4%) 0.3384
 Fluid input (L) 1.8 ± 1.2 1.6 ± 0.9 0.0184
  1. RTP reverse Trendelenburg, decreased RTP, Yes RTP throughout or a portion of the operative procedure, ASA American Society of Anesthesiologists