Home » What are the benefits of bariatric surgery?
It is well accepted that weight loss leads to improvement of obesity associated diseases, prolongs life and improves the quality of life. In order to achieve these benefits, the weight loss must be permanent.
There are a variety of ways that people have found to try to treat obesity, including diets, behavior therapy and diet pills. There is no doubt that morbidly obese patients can go on a diet and lose weight. You have done this several times.
The difficulty is maintaining the weight loss for the rest of your life.
In a famous study by Wolf and Colditz in 1996, patients were placed on a diet and followed for more than a year. The proportion of patients dropping out of the assigned diet regimen was over 90% by 52 weeks (graph).
In simpler terms, it is very difficult for morbidly obese patients to stay on a permanent diet.
Maintaining weight following a successful diet is also problematic.
A well known study by Dr. Stunkard and colleagues showed that patients placed on diet lost up to 30 lbs on a very low calorie diet for 4 months, but once stopped, they regained all the lost weight, and in some cases, even more(table).
|Years Followed||Weight Loss on Diet (lbs)||Mean Time on Diet (months)||Regained Weight (lbs)|
This “yo-yo” dieting with weight going down and than back up was observed over 5 years of follow-up in this study.
Weight-loss surgery has been shown to be very effective at producing significant and sustained weight-loss.
Weight-loss operations done today are effective when they are done in a center that offers an aftercare program that focuses on dietary, behavioral and exercise changes like our RPM Program and most importantly, when the patient is willing to work WITH their operation.
Each of the available surgeries truly is a “tool” that will help to control hunger and portion size, but that’s it! The rest is up to the patient.
In general, gastric bypass patients will lose around 70 percent of their excess weight, sleeve gastrectomy patients will lose around 60 percent.
For example, if you are 100 lbs overweight, you will lose an average of 70 lbs and keep this off for the rest of your life.
Gastric bypass and sleeve gastrectomy patients almost always achieve the expected weight-loss outlined above. We do not worry about these patients losing weight; we worry about them regaining it down the road. This will occur if they do not follow our long term instructions and modify their lifestyle with the help of the surgery.
All the obesity-associated conditions are cured or at least improved by weight loss through bariatric surgery. The graphic lists the actual rates based on multiple research studies. Please note that individual results may vary.
Morbid obesity is associated with decreased life span. The life expectancy of a man in his 20s, is 13 years shorter, if his BMI is over 45 Kg/m2.
In 2004 we reported our landmark study where we followed over 1,000 patients after bariatric surgery and compared them to over 5,000 morbidly obese patients without surgery. We found that the 5-year mortality rate in the bariatric surgical group was 0.68% compared with 6.2% in the medically managed patients— an 89% relative risk reduction in mortality.
The above findings have been reproduced by other research teams throughout the word as highlighted in the table below.
|Study Center||Type of Surgery||Death Risk Reduction|
|McGill University (Canada)||Gastric bypass||89%|
|Padua University (Italy)||Gastric bnading||60%|
|Monash University (Australia)||Gastric banding||72%|
(Sweden SOS study)
|Gastric bypass, Gastroplasty,
|Utah University (USA)||Gastric bypass||40%|
These scientific research studies tell us that if a morbidly obese patient undergoes surgery today, he/she will reduce their chance of dying by an average of 57%* compared to a patient with no surgery.
Another way to interpret this research is that every year of waiting for bariatric surgery increases the risk of death by about 5-10%.*
* – Individual results may vary.