BMI gradings

Number of patients

Mean operative time

(IQR)

p-value (ANOVA test)

BMI < 18.5

(underweight)

9

76 (30-100)

BMI 18.5-24.9 (normal)

91

87 (60-100)

BMI 25-29.9 (overweight)

183

87 (60-110)

BMI 30-34.9 (class I obesity)

174

92 (65-120)

BMI 35-39.9 (class II obesity)

121

93 (65-118)

BMI > 40 (class III obesity)

112

87 (60-114)

0.7149