title: Prognostic factors for local control in non-small-cell lung cancer treated with definitive radiation therapy.
abstract: Radiotherapy plays an important role as a treatment for locally advanced non-small-cell lung cancer (NSCLC), but local failure still occurs in 70% to 80% of the patients. A retrospective analysis was carried out to evaluate the local control predictors for non-SCLC. From January 1990 to December 1996, 256 patients with stages I-IIIb NSCLC entered this analysis. All patients received definitive radiotherapy. The significance of prognostic variables on local control was evaluated using univariate analysis and Cox stepwise regression model. The prognostic index was calculated according to the value of each prognostic factor on local control. Median local progression-free survival time of the whole group was 9.7 months, and 1-, 3-, and 5-year actuarial local progression-free survival were 54%, 24%, and 19%, respectively. Univariate and multivariate analyses showed patients with smaller tumor volume, earlier clinical staging, and treated with higher total dose in shortened overall treatment time had better local control. Tumor volume, clinical staging, and radiotherapy methods were independent prognostic factors on local control. The prognostic index model could predict the local control condition of NSCLC treated with radiation therapy more effectively than a single variable such as TNM staging.
authors.affiliation: Department of Radiation Oncology, Cancer Center, Sun Yat-sen University of Medical Sciences, 651 Dong-Feng Road, Guangzhou 510060, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.forename: Guo-Liang
authors.initials: GL
authors.lastname: Jiang
authors.forename: Xiao-Long
authors.initials: XL
authors.lastname: Fu
authors.forename: Li-Juan
authors.initials: LJ
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Qian
authors.forename: Sen
authors.initials: S
authors.lastname: Zhao
authors.forename: Tai-Fu
authors.initials: TF
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D002289:Carcinoma, Non-Small-Cell Lung / Q000473:pathology / Q000532:radiotherapy*; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology / Q000532:radiotherapy*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016016:Proportional Hazards Models; D011879:Radiotherapy Dosage; D012189:Retrospective Studies; D016019:Survival Analysis