Obesity Surgery for obese people suffering anxiety.

Extremely obese people suffering from depression or anxiety tend to lose less weight after obesity surgery than mentally healthy people, researchers reported Thursday in a study that suggests such patients could benefit from treatment beforehand.
People diagnosed with mood or anxiety disorders on average lost 81 pounds six months after gastric bypass surgery compared to their counterparts who shed 86 pounds. Although both groups lost significant weight after surgery, people without mental health problems did slightly better.

The federally funded research was presented at a meeting of bariatric surgeons in San Diego Thursday. Researchers plan to follow patients for up to two years to determine if there’s a weight difference over time.

Many hospitals and insurers require surgery candidates to go through a psychological evaluation before obesity surgery to make sure they are mentally fit for the operation and the lifestyle change afterward. Depressed people aren’t automatically disqualified for surgery, but those who are suicidal or abusing drugs and alcohol are usually ruled out.

How depression and other mental health disorders are handled before obesity surgery vary widely by medical center.

In the new study, Pittsburgh researchers interviewed 207 surgery candidates and found two-thirds had a history of depression, bipolar disorder, post-traumatic stress syndrome or panic attacks. The vast majority were women with an average body-mass index of 51. A person with a BMI of over 40 is considered morbidly obese.

After adjusting for age, gender and race, researchers compared weight loss six months after surgery. Patients with a history of depression on average weighed 322 pounds before surgery and 241 afterward. Those with no mental health problems weighed 303 pounds before the operation and 217 pounds afterward.

Gastric bypass, or stomach-stapling surgery, is the most common obesity operation performed in the United States with about 177,600 people undergoing the procedure last year. Federal guidelines say a person should be at least 100 pounds overweight and should have tried traditional weight-loss means before choosing surgery.

Gastric bypass involves reducing the size of the stomach and bypassing part of the small intestine, where digestion occurs. People eat less and absorb fewer calories as a result.