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Efficacy and side effects of cisplatin- and carboplatin-based doublet chemotherapeutic regimens versus non-platinum-based doublet chemotherapeutic regimens as first line treatment of metastatic non-small cell lung carcinoma: a systematic review of randomized controlled trials
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Evidence suggests that platinum-based regimens confer a better survival in patients with non-small cell lung carcinoma (NSCLC). However, evidence is lacking regarding the specific effects of cisplatin or carboplatin when compared to non-platinum-based doublets. METHODS: Meta-analysis of all randomized trials comparing non-platinum-based with platinum-based doublet regimens given as first-line treatment for NSCLC. Relative risks were calculated for all outcomes ascertained. Sensitivity analysis, using methodological quality of the trials and different measures of effect, was undertaken. RESULTS: Seventeen trials, comprising 4920 patients were included. The use of platinum-based doublet regimens was associated with a slightly higher survival at 1 year (RR=1.08, 95% CI 1.01-1.16, p=0.03), better partial response (RR=1.11, 95% CI 1.02-1.21, p=0.02), with a higher risk of anemia, nausea, and neurotoxicity. Cisplatin-based doublet regimens improved survival at 1 year (RR=1.16, 95% CI 1.06-1.27, p=0.001), complete response (RR=2.29, 95% CI 1.08-4.88, p=0.03), partial response (RR=1.19, 95% CI 1.07-1.32, p=0.002) with an increased risk of anemia, neutropenia, neurotoxicity and nausea. Conversely, carboplatin-based doublet regimens did not increase survival rate at 1 year (RR=0.95, 95% CI 0.85-1.07, p=0.43). There was a statistically significant difference between the effect of cisplatin compared to carboplatin (p=0.05). Carboplatin-based doublet regimen included a higher risk of anemia and thrombocytopenia, but no increased nausea and/or vomiting, contrarily to cisplatin. Sensitivity analyses showed that the results were robust to the exclusion of lesser quality trials and the choice of the measure of effect. CONCLUSION: We provide additional evidence that cisplatin, but not carboplatin-based doublet regimens are associated with a slightly better survival compared to non-platinum-based doublet regimens. Side effects of cisplatin- and carboplatin-based regimens differ between each other and when compared to non-platinum doublets. Although this analysis has limitations, it may provide valuable information to clinicians when choosing the appropriate regimen for patients with non-small cell lung cancer.
Antineoplastic Combined Chemotherapy Protocols/therapeutic use, Carboplatin/administration & dosage, Carcinoma, Non-Small-Cell Lung/drug therapy, Carcinoma, Non-Small-Cell Lung/mortality, Carcinoma, Non-Small-Cell Lung/pathology, Cisplatin/administration & dosage, Humans, Lung Neoplasms/drug therapy, Lung Neoplasms/mortality, Lung Neoplasms/pathology, Neoplasm Metastasis, Randomized Controlled Trials as Topic
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