Methods: 169 patients who had undergone resectable therapy for lung cancer between January 1998 and May 1999 were followed-up(end time was May 2002)to make certain how long the survival was and know the time and cause if the patients had been dead.

• 方法：对1998年1月至1999年5月手术切除并经病理确诊为原发性支气管肺癌的169例患者进行随访(随访截止时间为2002年5月),了解患者目前是否健在； 若患者已死亡，明确其死亡的时间和原因。