(HealthDay News) − Higher rates of bariatric surgery complications are seen in patients with chronic kidney disease (CKD), with advancing disease stage correlating with increasing complication rates.

Nicole A. Turgeon, MD, of Emory University in Atlanta, and colleagues analyzed data from 27,736 bariatric surgery patients to assess the effect of CKD on the risks of bariatric surgery.

The researchers found that 0.12% of patients were undergoing long-term dialysis before surgery. Of those patients not undergoing dialysis, 75% either had normal estimated glomerular filtration rate (GFR) or stage 1 CKD, and 18.07, 6.25, 0.34, and 0.33% had stage 2, 3, 4, and 5 CKD, respectively. CKD stage was associated with complication rate in an unadjusted analysis, from 4.6% for those with normal estimated GFR or stage 1 CKD to 9.9% for those with stage 5 CKD. On multivariable analysis, CKD stage predicted increased complication rates, with an odds ratio of 1.30 for each higher CKD stage. Despite the higher risk, the overall rate of complications was less than 10%.

“In conclusion, this study demonstrates that patients with higher stages of CKD undergoing bariatric surgery had higher complication rates than patients with lower stages of CKD or with normal renal function. Although the relative risk is higher, the absolute risk for complications after bariatric surgery remains low in this patient population,” the authors write.

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