Real-world treatment and retreatment patterns and outcomes in patients with advanced or metastatic non-small cell lung cancer following nivolumab monotherapy in second line or later in France: an I-O Optimise analysis.

Introduction: This study describes treatment and retreatment patterns and outcomes in patients in France following nivolumab as a second-line or later (2L+) treatment in locally advanced or metastatic non-small cell lung cancer (LAM NSCLC). Materials and methods: This analysis included adults with tumor, node, metastasis stage IIIB-IV NSCLC (as defined in the 7th or 8th edition American Joint Committee on Cancer/Union for International Cancer Control) treated with nivolumab monotherapy in 2L+ using data from the retrospective Epidemiological-Strategy and Medical Economics Lung Cancer database. The inclusion period was from January 1, 2015, to September 30, 2020, with a follow-up until September 30, 2021. Analyses were stratified according to the duration of index nivolumab treatment and tumor programmed death ligand 1 expression levels. Results: In total, the study included 4,001 patients (68% male; mean age [standard deviation] at index date, 63.6 [9.7] years) with a median follow-up of 34.3 months. The median nivolumab duration was 2.5 months (interquartile range, 1.4-6.3). The median overall survival (OS) from nivolumab initiation was 10.2 months (95% confidence interval [CI], 9.6-10.8). The median real-world progression-free survival and time to treatment discontinuation or death (95% CI) were 2.2 (2.1-2.3) and 2.7 (2.5-2.8) months, respectively. In total, 2,985 (74.6%) patients discontinued index nivolumab treatment: 226 (7.6% of discontinuers) received a further immune checkpoint inhibitor (ICI; 12.3% of discontinuers receiving further systemic treatment), and 1,604 (53.7%) received chemotherapy and/or targeted therapy. The proportion of ICI-retreated patients was the highest among those with the longest index treatment duration (15.8% among discontinuers receiving ≥26 weeks' index nivolumab). The median OS from retreatment was longer in the resumption (ICI restart without another therapy for ≥6 weeks) compared with the rechallenge (ICI restart following non-ICI therapy) patient subgroup. Conclusion: Few patients with LAM NSCLC in France received ICI retreatment following index nivolumab discontinuation, but the proportion increased with a longer duration of index nivolumab.