Obese patients undergoing cystectomy: a population-based, propensity score matched analysis

Area of Science:

• Urology
• Surgical Outcomes
• Obesity Research

Background:

• Obesity is a growing public health concern.
• Body Mass Index (BMI) is a common measure of obesity.
• The impact of obesity on surgical outcomes, specifically after cystectomy, requires thorough investigation.

Purpose of the Study:

• To evaluate the association between obesity, defined by BMI, and perioperative outcomes following cystectomy.
• To determine if obesity is an independent risk factor for complications after cystectomy.

Main Methods:

• Utilized data from the American College of Surgeons National Surgical Quality Improvement Program database (2005-2011).
• Included 1293 patients who underwent cystectomy, categorized by BMI (<30 kg/m² vs. ≥30 kg/m²).
• Performed a propensity score-matched analysis to compare perioperative outcomes between obese and non-obese groups.

Main Results:

• Obese patients (BMI ≥30) exhibited higher unadjusted rates of superficial surgical site infections and renal insufficiency, alongside longer operative times.
• Interestingly, obese patients showed lower unadjusted rates of pneumonia and cerebrovascular accidents, potentially linked to lower tobacco use.
• After propensity score-matching, only operative time remained significantly longer in obese patients; no differences in 30-day mortality were observed.

Conclusions:

• Obesity, as measured by BMI, is not an independent predictor of increased perioperative complications after cystectomy.
• The study suggests that obesity does not significantly elevate the risk of 30-day mortality in patients undergoing cystectomy.
• While some unadjusted complications were higher in obese patients, these differences were mitigated after statistical adjustment.