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Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer

  • Authors:
    • Yan‑Juan Zhu
    • Hai‑Bo Zhang
    • Yi‑Hong Liu
    • Jian‑Ping Bai
    • Yong Li
    • Li‑Rong Liu
    • Yan‑Chun Qu
    • Xin Qu
    • Xian Chen
  • View Affiliations / Copyright

    Affiliations: Department of Oncology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, Guangdong 510120, P.R. China
    Copyright: © Zhu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 655-664
    |
    Published online on: May 25, 2017
       https://doi.org/10.3892/ol.2017.6249
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Abstract

Progress in the treatment options for small cell lung cancer (SCLC) remains poor. Concerns exist regarding the efficacy of bevacizumab in SCLC. The present study aimed to evaluate the efficacy of bevacizumab in extensive stage (ES)‑SCLC. A meta‑analysis on studies conducted and listed on the Medline, Cochrane Trials, ASCO, ESMO and ClinicalTrial databases, and Chinese databases prior to April 2015 was performed. All clinical trials in which patients with ES‑SCLC were treated with bevacizumab were considered. Survival rates at specific time points were extracted from the reported survival curves. Hazard ratios (HR) for progression‑free survival (PFS) and overall survival (OS), rates for PFS, OS, overall response rate (ORR), and side‑effects were synthesized using random‑effects or fixed‑effects model. Two randomized control trials (RCT) (176 patients) and six single‑arm trials (292 patients) were identified. In RCTs, no statistically significant differences were observed in PFS [HR, 0.70; 95% confidence interval (CI), 0.41‑1.19; P=0.19] or OS (HR, 1.21; 95% CI, 0.84‑1.75; P=0.31). In the first‑line trials, pooled 6‑month and 1‑year PFS rates were 57% (95% CI, 39‑76%) and 10% (95% CI, 4‑16%), respectively. Synthesized 1‑year and 2‑year OS rates were 45% (95% CI, 36‑54%) and 10% (95% CI, 6‑14%), respectively. Reported median PFS and OS times for pretreated patients were 2.7‑4.0 months and 6.3‑7.4 months, respectively. Pooled ORRs were 71% (95% CI, 59‑82%) in the first‑line trials and 18% (95% CI, 11‑25%) in the second‑line trials. The most common types of reported toxicities were chemotherapy‑associated, including neutropenia, leukopenia, fatigue and thrombocytopenia. According to the RCTs, bevacizumab did not appear to improve the PFS or OS for patients with ES‑SCLC, with low quality of evidence. Due to the disappointing pooled efficacy in the single‑arm trials, more clinical studies on bevacizumab in SCLC may not be valuable, although the evidence was with low quality.
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Copy and paste a formatted citation
Spandidos Publications style
Zhu YJ, Zhang HB, Liu YH, Bai JP, Li Y, Liu LR, Qu YC, Qu X and Chen X: Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer. Oncol Lett 14: 655-664, 2017.
APA
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L. ... Chen, X. (2017). Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer. Oncology Letters, 14, 655-664. https://doi.org/10.3892/ol.2017.6249
MLA
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L., Qu, Y., Qu, X., Chen, X."Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer". Oncology Letters 14.1 (2017): 655-664.
Chicago
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L., Qu, Y., Qu, X., Chen, X."Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer". Oncology Letters 14, no. 1 (2017): 655-664. https://doi.org/10.3892/ol.2017.6249
Copy and paste a formatted citation
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Spandidos Publications style
Zhu YJ, Zhang HB, Liu YH, Bai JP, Li Y, Liu LR, Qu YC, Qu X and Chen X: Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer. Oncol Lett 14: 655-664, 2017.
APA
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L. ... Chen, X. (2017). Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer. Oncology Letters, 14, 655-664. https://doi.org/10.3892/ol.2017.6249
MLA
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L., Qu, Y., Qu, X., Chen, X."Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer". Oncology Letters 14.1 (2017): 655-664.
Chicago
Zhu, Y., Zhang, H., Liu, Y., Bai, J., Li, Y., Liu, L., Qu, Y., Qu, X., Chen, X."Meta-analysis of the role of bevacizumab in extensive stage small cell lung cancer". Oncology Letters 14, no. 1 (2017): 655-664. https://doi.org/10.3892/ol.2017.6249
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