SURVEILLANCE EPIDEMIOLOGY AND END RESULTS (SEER)

定期确定选定地理区域的癌症发病率 在人口和社会特征方面 人口中的一部分。估计美国的癌症发病率 按年计算。监测特定类型癌症的发病率趋势 尊重中国的地理区域以及人口和社会特征 人口数量。定期确定癌症患者的生存经验 在选定地理区域的居民中确诊的患者 美国。监测癌症患者存活率的趋势 癌症的形式，疾病的程度，治疗，以及人口，社会经济， 以及其他对预后有重要意义的参数。确定癌症病因 通过进行特殊研究来揭示人群中的 处于癌症高风险和低风险的人群。这些组可以通过以下方式定义 社会、职业、环境、饮食或其他特征，以及 通过吸毒史。

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.