Masaaki Iwatsuki1, Hiroyuki Yamamoto2,3, Hiroaki Miyata2,3, Yoshihiro Kakeji4, Kazuhiro Yoshida5, Hiroyuki Konno6, Yasuyuki Seto7, Hideo Baba8. 1. Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan. 2. Department of Healthcare Quality Assessment, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. 3. Department of Health Policy and Management, School of Medicine, Keio University, Tokyo, Japan. 4. Database Committee, The Japanese Society of Gastroenterological Surgery, Tokyo, Japan. 5. Department of Surgical Oncology, Gifu University School of Medicine, Gifu, Japan. 6. Hamamatsu University School of Medicine, Hamamatsu, Japan. 7. The Japanese Society of Gastroenterological Surgery, Tokyo, Japan. 8. Department of Gastroenterological Surgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan. hdobaba@kumamoto-u.ac.jp.
Abstract
BACKGROUND: Despite interest in surgeon and hospital volume effects on distal gastrectomy, clinical significance has not been confirmed in a large-scale population. We studied to clarify the effects of surgeon and hospital volume on postoperative mortality after distal gastrectomy for gastric cancer among Japanese patients in a nationwide web-based data entry system. METHODS: We extracted data on distal gastrectomy for gastric cancer from the National Clinical Database between 2011 and 2015. The primary outcome was operative mortality. Hospital volume was divided into 3 tertiles: low (1-22 cases per year), medium (23-51) and high (52-404). Surgeon volume was divided into the 5 groups: 0-3, 4-10, 11-20, 21-50, 51 + cases per year. We calculated the 95% confidence interval (CI) for the mortality rate based on odds ratios (ORs) estimated from a hierarchical logistic regression model. RESULTS: We analyzed 145,523 patients at 2182 institutions. Operative mortality was 1.9% in low-, 1.0% in medium- and 0.5% in high-volume hospitals. The operative mortality rate decreased definitively with surgeon volume, 1.6% in the 0-3 group and 0.3% in the 51 + group. After risk adjustment for surgeon and hospital volume and patient characteristics, hospital volume was significantly associated with operative morality (medium: OR 0.64, 95% CI 0.56-0.73, P < 0.001; high: OR 0.42, 95% CI 0.35-0.51, P < 0.001). CONCLUSIONS: We demonstrate that hospital volume can have a crucial impact on postoperative mortality after distal gastrectomy compared with surgeon volume in a nationwide population study. These findings suggest that centralization may improve outcomes after distal gastrectomy.
BACKGROUND: Despite interest in surgeon and hospital volume effects on distal gastrectomy, clinical significance has not been confirmed in a large-scale population. We studied to clarify the effects of surgeon and hospital volume on postoperative mortality after distal gastrectomy for gastric cancer among Japanese patients in a nationwide web-based data entry system. METHODS: We extracted data on distal gastrectomy for gastric cancer from the National Clinical Database between 2011 and 2015. The primary outcome was operative mortality. Hospital volume was divided into 3 tertiles: low (1-22 cases per year), medium (23-51) and high (52-404). Surgeon volume was divided into the 5 groups: 0-3, 4-10, 11-20, 21-50, 51 + cases per year. We calculated the 95% confidence interval (CI) for the mortality rate based on odds ratios (ORs) estimated from a hierarchical logistic regression model. RESULTS: We analyzed 145,523 patients at 2182 institutions. Operative mortality was 1.9% in low-, 1.0% in medium- and 0.5% in high-volume hospitals. The operative mortality rate decreased definitively with surgeon volume, 1.6% in the 0-3 group and 0.3% in the 51 + group. After risk adjustment for surgeon and hospital volume and patient characteristics, hospital volume was significantly associated with operative morality (medium: OR 0.64, 95% CI 0.56-0.73, P < 0.001; high: OR 0.42, 95% CI 0.35-0.51, P < 0.001). CONCLUSIONS: We demonstrate that hospital volume can have a crucial impact on postoperative mortality after distal gastrectomy compared with surgeon volume in a nationwide population study. These findings suggest that centralization may improve outcomes after distal gastrectomy.
Authors: Sarah R Kaslow; Zhongyang Ma; Leena Hani; Katherine Prendergast; Gerardo Vitiello; Ann Y Lee; Russell S Berman; Judith D Goldberg; Camilo Correa-Gallego Journal: J Surg Oncol Date: 2022-04-26 Impact factor: 2.885
Authors: John G Aversa; Laurence P Diggs; Brendan L Hagerty; Dana A Dominguez; Philip H G Ituarte; Jonathan M Hernandez; Jeremy L Davis; Andrew M Blakely Journal: J Gastrointest Surg Date: 2020-07-23 Impact factor: 3.267