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Vol.48 No.2 contents | Japanese/English |
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- Original Article -
Analysis of Overall Survival of 1120 Patients with Pathologically Diagnosed Primary Lung Cancer -Analysis of Patients Admitted to 7 Local Community Hospitals in Tokyo for 10 Years from 1991-
Bumpei Kimura1, Kazuhiko Takaoka1, Mitsuru Hashizume1, Kan Katoh2, Akinori Aikawa3, Kenji Kusajima4, Kayoko Tsuchiya4, Tomoko Takano5, Shuichi Inoue6, Etsuo Miyaoka71Department of Pulmonary Surgery, 2Department of Internal Medicine, Tokyo Kensei Hospital, Japan, 3Department of Surgery, 4Department of Pulmonary Medicine, Tachikawa Sougo Hospital, Japan, 5Department of Internal Medicine, Ohta Hospital, Japan, 6Department of Internal Medicine, Azusawa Hospital, Japan, 7Department of Mathematics, Tokyo University of Science, Japan
Purpose. To determine factors affecting the prognosis of primary lung cancers, overall survival rate of patients with cancers found in local community medical organizations was measured. Methods. A total of 1120 hospitalized patients who had been given a pathological diagnosis of primary lung cancer in 7 local community hospitals in Tokyo within 10-year period from 1991 were included in this study. To determine prognostic factors, a multivariate analysis method was employed. Reasons for diagnosis of the patients were categorized into 3 groups, such as the symptoms group (614 patients in whom a diagnosis was based on symptoms of lung cancers), mass survey group (205 cases detected by medical examination) and other diseases group (301 patients in whom lung cancer was diagnosed during treatment of other diseases), and comparative analysis were done between these 3 groups. Results. The overall 5-year survival rate was 24.7%. Factors affecting survival rate were gender, stage of diseases, reasons for diagnosis and therapeutic methods. Difference of hospitals was also recognized as another factor. Comparing the symptoms group, mass survey group and other diseases group, patients of the symptoms group were found mostly in disease stages IIIB and IV, and as small cell lung cancers originating in the hilum of lung. The surgical operation rate of the group was 18.9% and the 5-year survival rate was 13.1%. Most patients of the mass survey group and other diseases group were diagnosed in stage I, or were adenocarcinomas originating in the lung field. The surgical operation rates of the 2 groups were 66.8% and 52.5%, and the 5-year survival rates were 44.7% and 32.8%, respectively. Conclusion. This study showed that it is possible to raise the overall survival rate of primary lung cancer patients if diagnosis is established in local community medical organizations before symptoms of lung cancer appear.
key words: Primary lung cancer, Overall survival rate, Resection rate, Reasons for detection, Local community medical organization
Received: October 3, 2007
Accepted: January 17, 2008
JJLC 48 (2): 97-105, 2008
