INFLUENCE OF HOSPITAL AND SURGEON VOLUME ON OPERATIVE TIME, BLOOD LOSS, AND PERIOPERATIVE COMPLICATIONS IN RADICAL NEPHRECTOMY. THE RESULT FROM NATIONWIDE SURVEY IN JAPAN

81 INFLUENCE OF HOSPITAL AND SURGEON VOLUME ON OPERATIVE TIME, BLOOD LOSS, AND PERIOPERATIVE COMPLICATIONS IN RADICAL NEPHRECTOMY. THE RESULT FROM NATIONWIDE SURVEY IN JAPAN Hitoshi Yanaihara*, Nobuhiro Deguchi, Kohzo Fuji, Hideo Yasunaga, Yutaka Matsuyama, Kazuhiko Ohe. Saitama, Japan, and Tokyo, Japan. INTRODUCTIONAND OBJECTIVE: Most of the prior volumeoutcome researches for radical nephrectomy have just mentioned the relationship between hospital volume and mortality. We conducted a nationwide multi-center survey using medical record-based data to investigate the relationship between hospital/surgeon volumes and various outcomes including operative time, volume of blood loss, and incidence of perioperative complications in radical nephrectomy for renal cell carcinoma. METHODS: We collected a total of 1,704 patients undergoing radical nephrectomy at 461 hospitals in Japan between November 2006 and February 2007. In multi-variate analyses, the association between hospital/surgeon volumes and operative time, volume of blood loss, or