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Ann Thorac Surg 2004;77:1896-1902
© 2004 The Society of Thoracic Surgeons
a Department of Thoracic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
b Department of Basic Pathology, Graduate School of Medicine, Chiba University, Chiba, Japan
Accepted for publication October 2, 2003.
* Address reprint requests to Dr Fujisawa, Department of Thoracic Surgery, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan
e-mail: fujisawat{at}faculty.chiba-u.jp
BACKGROUND: The aim of this study was to clarify preoperative lung function as a prognostic factor for the long-term survival of, and to discuss the appropriateness of lobectomy for, patients with stage I non–small cell lung carcinoma who have poor preoperative pulmonary function.
METHODS: The study group consisted of 402 lobectomized patients with stage I non–small cell lung carcinoma treated by complete resection from 1985 to 1997. Preoperative percent forced vital capacity [(forced vital capacity/predicted forced vital capacity) x 100], FEV1% [(forced expiratory volume in 1 second/forced vital capacity) x 100], arterial carbon dioxide tension, and smoking were statistically analyzed as prognostic factors together with other host and tumor biologic factors.
RESULTS: Multivariate analysis demonstrated that tumor size (p < 0.0001) was the most significant prognostic factor for survival from primary lung cancer. Age (p < 0.0001), sex (p = 0.0036), and FEV1% (p = 0.0046) were found to be independent prognostic factors for survival from death by nonprimary lung cancer–related causes. Smoking was highly correlated with FEV1% (correlation coefficient = –0.511; p < 0.0001). The 100 patients with a preoperative FEV1% less than 70% included 34 patients with nonprimary lung cancer–related deaths, whereas the 302 patients with an FEV1% of 70% or greater included only 23 patients (p < 0.0001).
CONCLUSIONS: Along with tumor size, FEV1% is the most significant prognostic factor for patients with stage I non–small cell lung carcinoma with regard to survival from death by other causes. Lobectomy may not be preferred as an appropriate surgical modality for patients with stage I non–small cell lung carcinoma with small peripheral nodules who exhibit poor pulmonary function, especially lowered FEV1%.
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