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Table 4 Logistic regression for risk of postoperative complications by comorbidities. Multivariable regression for the risk of postoperative complications

From: Surgery for acute cholecystitis in severely comorbid patients: a population-based study on acute cholecystitis

  Unadjusted Adjusted
Factor (reference) OR (95% CI) p OR (95% CI) p
Female sex (Male) 0.89 (0.59–1.36) 0.597 0.86 (0.55–1.35) 0.525
Age (continuous) 1.02 (1.01–1.04) 0.004 0.99 (0.97–1.02) 0.647
BMI (continuous) 0.98 (0.94–1.02) 0.390 0.97 (0.93–1.02) 0.249
ASA 2 (ASA1) 1.44 (0.82–2.56) 0.208 1.42 (0.73–2.75) 0.300
ASA3 3.16 (1.72–5.82)  < 0.001 2.51 (1.11–5.68) 0.027
ASA 4 0.01 (0–2 × 1017) 0.842 0.01 (0–1 × 1017) 0.833
CCI (continuous) 1.24 (1.12–1.38)  < 0.001 1.16 (0.94–1.42) 0.164
Vascular disease (No) 2.08 (1.34–3.23) 0.001   
Diabetes (No) 1.14 (0.59–2.19) 0.704   
Pulmonary disease (No) 1.03 (0.54–1.97) 0.937   
Other comorbidities (No) 2.38 (1.29–4.41) 0.006   
Bleeding risk (No) 2.44 (1.17–5.10) 0.018   
Cholecystitis grade 2–3 (Grade 1) 1.39 (0.91–2.13) 0.126 1.47 (0.88–2.45) 0.140
Current smoker (Not smoker) 0.71 (0.32–1.61) 0.417 0.75 (0.33–1.73) 0.502
Time from symptoms to surgery (continuous) 1.03 (0.97–1.11) 0.321 1 (0.93–1.09) 0.910
  1. Degrees of freedom were 1 for all unadjusted tests except ASA-classification where it was 3. Degrees of freedom for adjusted test were 9
  2. ASA American Society of Anesthesiologists physical status classification, BMI Body Mass Index, CCI Charlson Comorbidity Index, OR Odds Ratio, Vascular disease: Includes cardiac, cerebral, and peripheral vascular disease
  3. 95% CI: 95% Confidence interval