Health-care costs are affected by obesity with both the direct and indirect costs of health care increasing as body mass index (BMI) increases. However, one important aspect of obesity that lacks rigorous study is what impact BMI has on direct surgical cost. We performed a retrospective cohort study of women undergoing a laparoscopic hysterectomy at our single academic university center between January 2012 and December 2017. Women were excluded if their surgery was performed by anyone other than those surgeons with subspecialty training in minimally invasive gynecologic surgery (MIGS), if their hysterectomy was performed by a modality other than conventional laparoscopy or with robotic assistance, or if the indication for hysterectomy was related to any gynecologic malignancy. We identified 600 patients who underwent laparoscopic hysterectomy during the study period. Women who underwent robotic hysterectomy, compared to laparoscopic, had a shorter operative time, lower estimated blood loss, and shorter length of stay. Mean direct cost (± standard deviation) for the cohort was $6398.53 ± $2304.67, age was 44.5 ± 7.5 years, and BMI was 32.2 ± 7.6. Direct cost for all laparoscopic hysterectomies was evaluated across the five different BMI quintiles and no significant difference between groups was found. There was no significant difference in direct cost across procedures between obese and non-obese patients (p = 0.62) and this remained true when separated out by surgical modality. However, when evaluating morbidly obese patients, there appears to be a trend toward cost reduction with robotic hysterectomy compared to conventional laparoscopy. It does not appear that BMI has a statistically significant impact on direct cost between robotic-assisted and conventional laparoscopic hysterectomy. However, these findings may be due to surgical proficiency and warrant further investigation among surgeons with lesser volume.
Keywords: Cost; Gynecology; Laparoscopic hysterectomy; Obesity; Robotic surgery.