SURVEILLANCE EPIDEMIOLOGY AND END RESULTS

定期确定选定地理区域的癌症发病率 美国的人口和社会特征 的人口。 估计美国的癌症发病率， 每年的基础上。 监测特定形式癌症的发病率趋势， 考虑到地理区域以及人口和社会特征， 人口。 定期确定癌症的生存经验 在选定的地理区域的居民中诊断的患者 美国的 监测癌症患者生存率的趋势， 癌症的形式，疾病的程度，治疗，以及人口统计学，社会经济学， 和其他重要的预后参数。 确定癌症病因 通过进行特别研究，揭示了 高和低癌症风险人群。 这些组可以由以下定义： 社会、职业、环境、饮食或其他特征，以及 药物历史

Determine periodically the incidence of cancer in selected geographic areas of the United States with respect to demographic and social characteristics of the population. Estimate cancer incidence for the United States on an annual basis. Monitor trends in incidence of specific forms of cancer with respect to geographic area and demographic and social characteristics of the population. Determine periodically survival experience for cancer patients diagnosed among residents of selected geographic areas of the United States. Monitor trends in cancer patient survival with respect to form of cancer, extent of disease, therapy, and demographic, socioeconomic, and other parameters of prognostic importance. Identify cancer etiologic factors by conducting special studies which disclose groups of the population at high and low cancer risks. These groups may be defined by social, occupational, environmental, dietary, or other characteristics, and by drug history.