Effects of increased body mass index upon laparoscopic radical rectal surgery and its clinical efficacy

To assess the feasibility, the safety and short-term outcomes of laparoscopic radical rectal surgery for rectal cancer patients with increased body mass index (BMI) . Retrospectively data reviews were conducted for 405 consecutive patients undergoing laparoscopic surgery for rectal cancer from June 2008 to June 2012. They were classified as normal-weight (NW, BMI 18.6-22.9 kg/m(2), n = 165), overweight (OW, BMI 23.0-24.9 kg/m(2), n = 125), and obese (OB, BMI ≥ 25.0 kg/m(2), n = 115)groups according to the categories as proposed by 2007 Chinese Obesity Surgery Treatment Guidelines. The differences of oncologic, intraoperative and postoperative status, postoperative complications, number of resected lymph nodes and short-term survival rates were compared among three groups. The data were analyzed by χ(2) or Fisher exact test. The Mann-Whitney U test or analysis of variance (one-way ANOVA) was used for parametric comparisons. The survival curve was drawn by Kaplan Meier method and the survivals of 3 groups were