Reporting Results After Bariatric Surgery: Reproducibility of Predicted Body Mass Index

Background There is a controversy about the best way to report results after bariatric surgery. Several indices have been proposed over the years such as percentage of total weight loss (%TWL), percentage of excess weight loss (%EWL), and percentage of excess body mass index loss (%EBMIL). More recently, it has been suggested to individualize the body mass index (BMI) goal to be achieved by the patients (predicted BMI—PBMI). The objective was to assess the reproducibility of this PBMI in our service. Methods In this retrospective study, we assessed the %TWL, %EWL, %EBMIL (with expected BMI of 25 kg/m 2 ), and %EBMIL (with PBMI) over 4 years of observation in two groups of patients: BMI