Research Study Links Bariatric Surgery to Life Expectancy

Impact of Obesity on Health

Obesity significantly impacts life expectancy, contributing to various health conditions, including diabetes mellitus, cardiovascular disease, hypertension, stroke, and certain cancers. These conditions not only diminish the quality of life but also elevate the risk of premature death. Bariatric surgery has been recognized for its ability to lower mortality associated with obesity, yet its direct effect on life expectancy has remained uncertain.

Study Overview

In 1987, researchers from the University of Gothenburg initiated a comprehensive study involving Swedish subjects with obesity to explore the effects of bariatric surgery on life expectancy. The study analyzed data from 2,007 adult patients who underwent bariatric surgery and a control group of 2,040 individuals who received conventional (non-surgical) obesity treatment, recruited between September 1, 1987, and January 31, 2001. Additionally, a representative sample of 1,135 participants from the general population was included.

Key Findings

The results, published in The New England Journal of Medicine (NEJM), revealed that bariatric surgery is linked to a longer life expectancy in patients with obesity compared to those receiving non-surgical treatment. Key findings include:

– The average life expectancy of patients who underwent bariatric surgery was three years longer than that of those treated with non-surgical methods.
– Despite the improvement, life expectancy for bariatric surgery patients remained 5.5 years shorter than that of the general population.
– Patients receiving non-surgical treatment for obesity exhibited an average life expectancy approximately eight years shorter than the general population.

Factors Influencing Mortality

Despite the positive association between bariatric surgery and increased life expectancy, mortality rates were still higher than those in the general population. Potential reasons for this persistent gap include:

– Irreversible effects of obesity-related metabolic dysfunction
– Surgical complications
– Other risk factors leading to death, such as alcoholism, suicide, and trauma

The study also indicated an increased risk of alcohol abuse, suicide, self-harm, and severe fall-related injuries among patients with obesity who underwent bariatric surgery compared to those who did not. These findings are consistent with previous research.

Implications for Future Research

The study emphasizes the need for enhanced strategies in identifying patients at greater risk for substance abuse or self-harm, which could potentially improve survival rates associated with bariatric surgery.

Conclusion

Bariatric surgery is proven to facilitate significant, lasting weight loss and reduce the risks of cardiovascular disease, diabetes mellitus, and cancer. This recent research indicates that bariatric surgery can extend life expectancy for the average patient in comparison to non-surgical obesity treatments. However, researchers caution that the findings reflect averages and do not account for variations among individual patients. Comprehensive pre- and post-operative education and monitoring are essential for the success of bariatric surgery. It is crucial for each patient to receive adequate information to make informed decisions regarding obesity treatment.

References

Carlsson, L., Sjöholm, K., Jacobson, P., Andersson-Assarsson, J., Svensson, P., Taube, M., Carlsson, B. and Peltonen, M., 2020. Life Expectancy after Bariatric Surgery in the Swedish Obese Subjects Study. New England Journal of Medicine, 383(16), pp.1535-1543.
Overweight And Obese Adults, 2018. [ebook] Statistics Canada. Available at: [Accessed 29 October 2020].
Who.int. 2020. WHO | Controlling The Global Obesity Epidemic. [online] Available at: [Accessed 29 October 2020].
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