Slater G, Papatestas A E, Tartter P I, Mulvihill M, Aufses A H
Am J Gastroenterol. 1982 Feb;77(2):63-6.
The age distributions in different anatomic areas of the colorectum were compared in 410 patients. The average age for patients with right-sided cancers (71.3 yr) was significantly higher than that for patients with left-sided cancers (67.5 yr). In addition, there was a significantly higher percentage of patients over the age of 70 (mean age of the whole group) in the right colon group as compared with the left colon group. It was concluded that the older age distribution of right-sided cancers might be explained by the delayed effect of an environmental carcinogen in a population with a longer life expectancy.
对410例患者结直肠不同解剖部位的年龄分布进行了比较。右侧结肠癌患者的平均年龄（71.3岁）显著高于左侧结肠癌患者（67.5岁）。此外，与左半结肠组相比，右半结肠组中年龄超过70岁（全组平均年龄）的患者比例显著更高。研究得出结论，右侧结肠癌患者年龄分布较大可能是由于环境致癌物在预期寿命较长的人群中的延迟效应所致。
