Journal
THORACIC CANCER
Volume 13, Issue 19, Pages 2776-2785Publisher
WILEY
DOI: 10.1111/1759-7714.14621
Keywords
atezolizumab; carboplatin; etoposide; overall survival; post-progression survival
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This study evaluated the relationship between PFS, PPS, and OS in relapsed ED-SCLC patients treated with atezolizumab plus carboplatin and etoposide as first-line therapy. The results showed a strong correlation between PPS and OS, and a moderate correlation between PFS and OS.
Background The effect of first-line chemotherapy on overall survival (OS) may be significantly influenced by subsequent therapy for patients with extensive disease small cell lung cancer (ED-SCLC). Therefore, we evaluated the relationship between progression-free survival (PFS), post-progression survival (PPS), and OS of ED-SCLC patients treated with atezolizumab plus carboplatin and etoposide as first-line therapy. Methods We analyzed the data of 57 patients with relapsed ED-SCLC treated with atezolizumab plus carboplatin and etoposide (AteCE) as first-line chemotherapy between August 2019 and September 2020. The respective correlations between PFS-OS and PPS-OS following first-line AteCE treatment were examined at the individual patient level. Results Spearman's rank correlation analysis and linear regression analysis showed that PPS strongly correlated with OS (r = 0.93, p < 0.05, R-2 = 0.85) and that PFS moderately correlated with OS (r = 0.55, p < 0.05, R-2 = 0.28). Performance status at relapse (0-1/>= 2), number of cycles of atezolizumab maintenance therapy (<3/>= 3), and platinum rechallenge chemotherapy all significantly positively correlated with PPS (p < 0.05). Conclusions Upon comparing OS-PFS and OS-PPS in this patient population, OS and PPS were found to have a stronger correlation. These results suggest that performance status at relapse, atezolizumab maintenance, or chemotherapy rechallenge could affect PPS.
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