Treatment patterns and clinical outcomes in patients with advanced non-small cell lung cancer initiating first-line trea
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ORIGINAL ARTICLE – CANCER RESEARCH
Treatment patterns and clinical outcomes in patients with advanced non‑small cell lung cancer initiating first‑line treatment in the US community oncology setting: a real‑world retrospective observational study Eric Nadler1,2 · Bhakti Arondekar3 · Kathleen Marie Aguilar2 · Jie Zhou2 · Jane Chang3 · Xinke Zhang4,5 · Vivek Pawar4,5 Received: 29 May 2020 / Accepted: 18 August 2020 © The Author(s) 2020
Abstract Purpose Treatments for advanced non-small cell lung cancer (NSCLC) have evolved to include targeted and immuno-oncology therapies, which have demonstrated clinical benefits in clinical trials. However, few real-world studies have evaluated these treatments in the first-line setting. Methods Adult patients with advanced NSCLC who initiated first-line treatment with chemotherapy, targeted therapies (TT), or immuno-oncology–based regimens in the US Oncology Network (USON) between March 1, 2015, and August 1, 2018, were included and followed up through February 1, 2019. Data were sourced from structured fields of USON electronic health records. Patient and treatment characteristics were assessed descriptively, with Kaplan-Meier methods used to evaluate time-to-event outcomes, including time to treatment discontinuation (TTD) and overall survival (OS). Adjusted Cox regression analyses and inverse probability of treatment weighting (IPTW) were performed to control for covariates that may have affected treatment selection and outcomes. Results Of 7746 patients, 75.6% received first-line systemic chemotherapy, 11.7% received immuno-oncology monotherapies, 8.5% received TT, and 4.2% received immuno-oncology combination regimens. Patients who received immuno-oncology monotherapies had the longest median TTD (3.5 months; 95% confidence interval [CI], 2.8–4.2) and OS (19.9 months; 95% CI, 16.6–24.1). On the basis of multivariable Cox regression and IPTW, immuno-oncology monotherapy was associated with reduced risk of death and treatment discontinuation relative to other treatments. Conclusion These results suggest that real-world outcomes in this community oncology setting improved with the introduction of immuno-oncology therapies. However, clinical benefits are limited in certain subgroups and tend to be reduced compared with clinical trial observations. Keywords Electronic health record · Immuno-oncology · Overall survival · Time to treatment discontinuation · Community oncology
Introduction Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00432-020-03414-4) contains supplementary material, which is available to authorized users. * Kathleen Marie Aguilar [email protected] 1
Texas Oncology-Baylor Charles A. Sammons Cancer Center, Dallas, TX, USA
McKesson Life Sciences, 10100101 Woodloch Forest Dr, The Woodlands, TX, USA
2
The treatment landscape for advanced, unresectable, and/or metastatic non-small cell lung cancer (NSCLC) is evolving. Although doublet and triplet systemic chemotherapies were 3
Pfizer Inc,
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