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Titolo:
The impact of overall treatment time on outcomes in radiation therapy for non-small cell lung cancer
Autore:
Chen, M; Jiang, GL; Fu, XL; Wang, LJ; Qian, H; Chen, GY; Zhao, S; Liu, TF;
Indirizzi:
Shanghai Med Univ, Canc Hosp, Dept Radiat Oncol, Shanghai 200032, Peoples R China Shanghai Med Univ Shanghai Peoples R China 200032 00032, Peoples R China
Titolo Testata:
LUNG CANCER
fascicolo: 1, volume: 28, anno: 2000,
pagine: 11 - 19
SICI:
0169-5002(200004)28:1<11:TIOOTT>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIOTHERAPY; CARCINOMA; TRIALS;
Keywords:
non-small cell lung cancer; radiotherapy; overall treatment time;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, M Shanghai Med Univ, Canc Hosp, Dept Radiat Oncol, 399 Ling Ling Rd,Shanghai 200032, Peoples R China Shanghai Med Univ 399 Ling Ling Rd Shanghai Peoples R China 200032
Citazione:
M. Chen et al., "The impact of overall treatment time on outcomes in radiation therapy for non-small cell lung cancer", LUNG CANC, 28(1), 2000, pp. 11-19

Abstract

Purpose: A retrospective study was carried out to evaluate the impact of overall treatment time (OTT) on the results of radiation therapy for non-small cell lung cancer (NSCLC). Materials and methods: From Jan. 1990 to Dec. 1996, 256 patients with stages I-IIIb NSCLC entered this analysis. All patients received definitive radiotherapy. Biologically effective dose (BED) was used to standardize the irradiation effects. The correlation between OTT and local progression-free survival was analyzed by linear-regression and Cox proportional hazard models. The prognostic variables for survival and distant metastasis were also briefly studied. Results: OTT had been shortenedin 64 patients because of an accelerated hyperfractionated irradiation, while OTT was prolonged in 114 patients due to interruptions of irradiation courses. The main causes of interruption were machine breakdown or delayed preparations of cerrobend block for boost fields (55%), holidays (11%) and treatment toxicity and side-effects (34%). Patients treated with prolonged OTT (> 45 days) had significant poorer local progression-free survival than whom with OTT of less than or equal to 45 days, 1, 3 and 5 year actuarial local progression-free survivals being 49, 17 and 15% for the former, and 74, 35 and 25% for the latter, respectively (P < 0.001). BED-T that containedthe factor of DTT correlated directly to local controls, which implied that BED-T represented radiobiological effects accurately, in other words, OTThad played a role in determining the radiobiological effects. Linear-regression on 103 cases treated with BED of 80-85 Gy(10) showed that 3 year local progression-free survival decreased by 9% per week with prolongation of OTT, or vice versa it increased by 9% per week with shortening OTT in an OTTrange of 30-76 days. Cox multivariate analyses confirmed that OTT was an independent prognostic factor for local controls. Conclusion: OTT may have played an important role in determining local controls in radiotherapy for NSCLC. One should always keep in mind to make the OTT as short as possible, provided the patients can tolerate it, and to reduce irradiation interruptions for whatever reasons to a minimum. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/10/20 alle ore 08:04:22