Effect of Bariatric Surgery on Ischemic Stroke risk
Patients with obesity who underwent bariatric surgery had 46% lower odds of stroke 1 year later, similar odds of stroke 3 years later, and 22% lower odds of stroke 5 years later, compared with matched control patients, in the new research.

Bariatric surgery has demonstrated improvements in cardiovascular health. The goal of this study was to compare the risk of stroke among bariatric surgery patients versus controls.

Researchers identified patients with BMI > 40 or BMI > 35 with qualifying comorbidities who underwent sleeve gastrectomy or gastric bypass. Similar patients who did not have bariatric surgery were used as controls. Coarsened exact matching in 1:1 fashion was performed, with logistic regression analysis to determine the effect of bariatric surgery on stroke risk at 1, 3, and 5 years. 96094 surgery patients and 1533725 controls were identified.

- Before matching, the stroke risk for surgery vs control was 0.05% vs 0.26% at 1 year, 0.13% vs 0.43% at 3 years, and 0.21% vs 0.59% at 5 years.

- After matching, the 1-year stroke risk among 95565 surgery patients and 95565 controls was 0.05% vs 0.15%.

- The 3-year stroke risk after surgery vs controls was 0.12% vs 0.28%.

- The 5-year stroke risk of surgery vs controls was 0.21% vs 0.41%.

Conclusively, bariatric surgery is associated with decreased stroke risk at 1,3, and 5 years, with the greatest effect seen in the 1st year.

ASMBS 2021
Source: https://asmbsmeeting.com/abstract/effect-of-bariatric-surgery-on-ischemic-stroke-risk/