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MINI 15 - Chemotherapy Developments for Lung Cancer (ID 128)
- Event: WCLC 2015
- Type: Mini Oral
- Track: Treatment of Advanced Diseases - NSCLC
- Presentations: 1
MINI15.09 - Bayesian Network Meta-Comparison of Maintenance Treatments for Advanced Non-Small-Cell Lung Cancer (NSCLC) Patients (ID 636)
16:45 - 18:15 | Author(s): S. Acharyya
Recent trials suggested that maintenance treatments improve outcomes for patients not progressing after first-line therapy for advanced NSCLC. However, physicians have little guidance on selecting which patients benefit the most and what drug or regimen is optimal. Here, we report a systematic review and network meta-analysis (NMA) of current evidence assessing relative efficacies of maintenance options in unselected populations, as well as in subgroups determined by EGFR mutation, histology, and response to induction.
PubMed and conference proceedings were reviewed and individual study relative efficacy measures were meta-analyzed in a Bayesian hierarchical model. The primary and secondary outcomes, Overall Survival (OS) and Progression Free Survival (PFS), respectviely, were evaluated in terms of (i) posterior surface under cumulative ranking curve (SUCRA), (ii) probability of being best treatment, (iii) probability of outperforming no maintenance, and (iv) posterior median hazard ratios with 95% credible intervals, in an unselected population, as well as by EGFR mutation status, histology, and response to induction. Secondary outcomes were overall survival (OS) and adverse events.
Twelve trials evaluating eight maintenance treatments in 3,850 patients were included in NMA. Selected maintenance treatments showed substantial PFS and OS benefits with probabilities ≥99% and ≥92% respectively of outperforming no maintenance. Results suggest the following strategy for optimal OS and PFS: (i) switch to or continue pemetrexed or switch to anti-EGFR TKI for nonsquamous patients, (ii) continue gemcitabine for squamous patients, (iii) switch to docetaxel or continue gemcitabine for responders to previous induction, and (iv) switch to or continue pemetrexed or switch to anti-EGFR TKI for patients with stable disease post-induction.
Maintenance treatments improve PFS and OS in good performance status patients with stage IIIb/IV NSCLC not progressing after first-line chemotherapy. Benefits are optimized by targeting specific maintenance treatments to selected patient groups guided by histology and response to previous induction.
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