Effect of obesity on chronic venous insufficiency treatment outcomes.

Background: Obesity is a known risk factor for the development and progression of chronic venous disorders (CVDs). It is currently unknown whether the treatment outcomes, after an intervention for CVDs, are affected by obesity. The purpose of the present investigation was to assess the effectiveness of various CVD treatments in obese patients and determine what level of obesity is associated with poor outcomes.

Methods: Data were prospectively collected in the Center for Vein Restoration electronic medical record system (NexGen Healthcare Information System, Irvine, Calif) and retrospectively analyzed. The patients and limbs were categorized by the following body mass index (BMI) categories: <25, 26 to 30, 31 to 35, 36 to 40, 41 to 45, and >46 kg/m. The changes in the revised venous clinical severity score and Chronic Venous Insufficiency Quality of Life Questionnaire 20-item (CIVIQ-20) quality of life survey were used to determine the CVD treatment effectiveness for patients who had undergone endovenous thermal ablation (TA), phlebectomy, or ultrasound-guided foam sclerotherapy (USGFS).

Results: From January 2015 to December 2017, 65,329 patients (77% female; 23% male) had undergone a venous procedure. Of these patients, 25,592 (39,919 limbs) had undergone ablation alone, ablation with phlebectomy, or ablation with phlebectomy and USGFS. The number of procedures performed was as follows: TA, n = 37,781; USGFS, n = 22,964; and phlebectomy, n = 17,467. The degree of improvement at 6 months after the procedure was progressively less with an increasing BMI for the patients who had undergone TA, and the decrease was more significant for those patients with a BMI >35 kg/m (P ≤ .001). The outcomes improved ∼12% with the addition of phlebectomy to TA. The patients who had undergone a combination of TA, phlebectomy, and USGFS demonstrated no additional improvement. Significantly inferior outcomes were noted in patients with a BMI ≥35 kg/m, with the poorest outcomes observed in patients with a BMI ≥46 kg/m (P ≤ .001). The average number of TAs per patient increased with an increasing BMI and was significantly different compared with the number for those with a BMI <30 kg/m (P ≤ .001). All pre- and post-CIVIQ-20 quality of life scores, within a BMI category, at 6 months were significantly different (P ≤ .01). No differences in the degree of improvement were observed in patients with a BMI ≥31 kg/m. Finally, multivariate logistic regression analysis indicated that when controlling for BMI, diabetes, a history of cancer, female gender, and black and Hispanic race were independently associated with poorer outcomes.

Conclusions: Progressive increases in BMI negatively affected CVD-related treatment outcomes as measured using the revised venous clinical severity score and CIVIQ-20. The outcomes progressively worsened with a BMI >35 kg/m for patients undergoing CVD treatment. The treatment outcomes for patients with a BMI ≥46 kg/m were so poor that weight loss management should be considered before offering CVD treatment.