Intermediate
Technical
IVT
excess weight loss percentage
Also written as: %EWL — excess weight loss percentage
A standardized metric measuring weight loss success as percentage of excess weight lost from baseline.
Full Definition
Excess weight loss percentage (%EWL) is a key outcome measure in bariatric surgery that calculates the proportion of excess weight lost relative to ideal body weight. It is calculated as: (preoperative weight - current weight) / (preoperative weight - ideal weight) × 100. This metric allows for standardized comparison of weight loss outcomes across different patients and procedures, with successful bariatric surgery typically defined as achieving >50% excess weight loss at two years post-operatively.
Usage
Usage note: Often abbreviated as %EWL or EWL% in clinical documentation.
In Context
- "The patient achieved 75% excess weight loss percentage at 24 months post-surgery." — Follow-up clinical note
- "Excess weight loss percentage remains the gold standard for measuring bariatric surgery success." — Research methodology paper
Also known as
%EWL
percent excess weight loss
Contrasted with
total body weight loss
absolute weight loss
Don't confuse with
total weight loss percentage
BMI reduction