Hughes R G, Hall T J, Block G E, Levin B, Moossa A R
Surg Gynecol Obstet. 1978 Jan;146(1):46-8.
Thirty-three carcinomas of the colon and rectum occurring in patients with ulcerative colitis have been compared with matched controls from a population without colitis. There is no difference in length of survival between the patients in the two groups. More extensive tumor spread in the control group is due to the method of selection.
对33例溃疡性结肠炎患者发生的结肠直肠癌与来自无结肠炎人群的匹配对照进行了比较。两组患者的生存时长没有差异。对照组中更广泛的肿瘤扩散是由于选择方法所致。