For their study, researchers conducted multivariable logistic regression analysis to determine any statistically significant association between BMI and mortality. They also relied on patient data from the American College of Surgeons National Surgical Quality Improvement Program. The study was conducted at 183 sites.
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Results of their analysis showed 3,245 of 189,533 patients who underwent general and vascular surgical procedures died within 30 days of their surgery. Patients with a BMI of less than 23.1 showed 40 percent higher odds of mortality, compared to patients in the middle range (26.3-29.7) for BMI. The researchers noted that the strength of this association depends on the type of primary procedure.
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