Does Genetic Predisposition Influence Surgical Results of Operations for Obesity?

Area of Science:

• Obesity research
• Bariatric surgery outcomes

Background:

• Obesity exhibits a significant familial predisposition.
• Investigating obesity incidence in relatives of bariatric surgery candidates.

Purpose of the Study:

• To document obesity incidence in immediate relatives of obese patients.
• To assess the impact of familial obesity predisposition on gastric surgery outcomes.

Main Methods:

• Measured height, weight, and BMI in 1841 relatives of obese patients and 1059 controls.
• Collected 52.9 ± 23.1-month post-surgery data from 44 patients with and 34 without a family history of obesity.

Main Results:

• Patients with BMI > 40 kg/m² were 24.5 times more likely to have a severely obese first-degree relative.
• Mothers were twice as likely as fathers to be severely obese.
• Successful surgical outcomes (BMI < 35 kg/m² or <50% excess weight loss) were achieved in 77% of patients with a family history versus 73% without (p=0.79).

Conclusions:

• A strong familial predisposition to obesity exists, yet over 50% of relatives of obese patients have a BMI < 30 kg/m².
• Gastric restrictive surgery leads to successful outcomes, inducing satiety irrespective of familial obesity history.
• Stable pre-operative weight suggests patients defend an elevated BMI, highlighting the need for surgical intervention.