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Table 2 Distribution of postoperative nausea and vomiting by hospital and urgency of open cholecystectomy.

From: Emergency open cholecystectomy is associated with markedly lower incidence of postoperative nausea and vomiting (PONV) than elective open cholecystectomy: a retrospective cohort study

Hospital Acuity No. Cases PONV OR/RR
No.(%)
PONV Ward
No.(%)
PONV
No.(%)(95% CI)
CRH Emerg 41 0(0%) 3(7.3%) 3(7.3%)(1.5 - 19.9%)
  Elect 150 8(5.3%) 41(27.3%) 42(28%)(21 - 35.9%)
UHWI Emerg 50 1(2%) 3(6%) 3(6%)(1.3 - 16.5%)
  Elect 25 0(0%) 8(32%) 8(32%)(14.9 - 53.5%)
TOTAL Emerg 91    6(6.6%)(2.5 - 13.8%)
  Elect 175    50(28.6%)(22 - 35.9%)
  1. OR/RR = Operating room/Recovery room
  2. CI = Confidence interval
  3. For risk of PONV after emergency versus elective open cholecystectomy at CRH, P = 0.006 (chi-squared test).
  4. For risk of PONV after emergency versus elective open cholecystectomy at UHWI, P = 0.003 (chi-squared test).
  5. For risk of PONV after emergency versus elective open cholecystectomy at both hospitals combined, P < 0.001 (chi-squared test).
  6. Unadjusted odds ratio for effect of emergency on PONV risk = 0.176 (CI, 0.072 - 0.43, P < 0.001).