title: Randomized trials of radiotherapy alone versus combined chemotherapy and radiotherapy in stages IIIa and IIIb nonsmall cell lung cancer. A meta-analysis.
abstract: BACKGROUND
  For patients with Stage III nonsmall cell lung cancer (NSCLC), radiation is the standard treatment, but survival remains poor. The authors performed a meta-analysis study using clinical trials that evaluated combined radiotherapy plus chemotherapy versus radiotherapy alone in patients with Stages IIIa and IIIb NSCLC:
  
  
  METHODS
  For the meta-analysis study and the point estimates, essential data were extracted directly from published reports.
  
  
  RESULTS
  Survival probabilities at 1, 2, 3, and 5 years, as estimated from published survival curves, were considered as the endpoints of interest. For survival at 3 and 5 years, the point estimates and the confidence intervals were used. Quality scoring of the studies also was performed. Fourteen trials were selected, comprising 1887 patients in the meta-analysis. For the cisplatin-based group, the estimated pooled odds ratio of death at 1 and 2 years was 0.76 (0.6-0.9 CI) and 0.70 (0.5-0.9 CI), with a reduction in mortality of 24% and 30%, respectively. For the noncisplatin-based group, the estimated pooled odds ratio at 1 and 2 years was 1.05 (0.7-1.5 CI) and 0.82 (0.5-1.3 CI), with a reduction in mortality of 5% and 18%, respectively. However, no significant differences were found between the percentage of survival and the CI at 3 and 5 years using the point estimates.
  
  
  CONCLUSIONS
  These results favor combined cisplatin-based chemotherapy and radiotherapy, although it was not so at 3 and 5 years of survival. These data must, however, be considered in the light of their clinical relevance and of the balance between quality of life, toxicity, and costs of chemotherapy.
authors.affiliation: Department of Internal Medicine, University of Milano, S. Paolo Hospital, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Marino
authors.forename: A
authors.initials: A
authors.lastname: Preatoni
authors.forename: A
authors.initials: A
authors.lastname: Cantoni
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy / Q000532:radiotherapy / Q000628:therapy*; D002945:Cisplatin / Q000627:therapeutic use; D003131:Combined Modality Therapy; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000532:radiotherapy / Q000628:therapy*
chemical_list: D002945:Cisplatin