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Table 2 Independent risk factors for conversion based on stepwise forward logistic regression

From: Laparoscopic cholecystectomy for acute calculous cholecystitis: a retrospective study assessing risk factors for conversion and complications

Risk factor OR (95% CI) P
Analysis of preoperative risk factors only
CRP over 150 mg/ml 3.0 (1.8–5.0) <0.001
Diabetes 1.8 (1.0–3.3) 0.045
Analysis including both preoperative and intraoperative risk factors
Abscess 9.2 (2.7–31.1) <0.001
Age over 65 years 1.9 (1.1–3.3) 0.023
Gangrene of the gallbladder 5.9 (3.4–10.2) <0.001
  1. The following preoperative findings were included in the stepwise forward logistic regression analysis of risk factors for conversion: age over 65 years, previous laparotomy on the upper abdomen, diabetes, CRP over 150 mg/ml and WBCC over 13x109/l. Gangrene of the gallbladder and abscess were added for the stepwise analysis of all risk factors. CRP C-reactive protein, WBCC white blood cell count