Comparison of outcome and cost between the open, laparoscopic, and robotic surgical treatments for colon cancer: a propensity score-matched analysis using nationwide hospital record database.

Background: There are limited studies that compare the cost and outcome of robotic-assisted surgery to open and laparoscopic surgery for colon cancer treatment. We aimed to compare the three surgical modalities for colon cancer treatment.

Methods: We performed a cohort study using the population-based Nationwide Inpatient Sample database. Patients with a primary diagnosis of colon cancer who underwent robotic, laparoscopic, or open surgeries between 2008 and 2014 were eligible for enrollment. We compared in-hospital mortality, complications, length of hospital stay, and cost for patients undergoing one of these three procedures using a multivariate adjusted logistic regression analysis and propensity score matching.

Results: Of the 531,536 patients undergoing surgical treatment for colon cancer during the study period, 348,645 (65.6%) patients underwent open surgeries, 174,748 (32.9%) underwent laparoscopic surgeries, and 8143 (1.5%) underwent robotic surgeries. In-hospital mortality, length of hospital stay, wound complications, general medical complications, general surgical complications, and costs of the three surgical treatment modalities. Compared to those undergoing laparoscopic surgery, patients undergoing open surgery had a higher mortality rate (OR 2.98, 95% CI 2.61-3.40), more general medical complications (OR 1.77, 95% CI 1.67-1.87), a longer length of hospital stay (6.60 vs. 4.36 days), and higher total cost ($18,541 vs. $14,487) in the propensity score matched cohort. Mortality rate and general medical complications were equivalent in the laparoscopic and robotic surgery groups, but the median cost was lower in the laparoscopic group ($14641 vs. $16,628 USD).

Conclusions: Laparoscopic colon cancer surgery was associated with a favourable short-term outcome and lower cost compared with open surgery. Robot-assisted surgery had comparable outcomes but higher cost as compared to laparoscopic surgery.