Figure 1.

Clustering analysis for grouping of death patterns and identifying the optimal cutoff of follow-up time in the subsequent analyses in 298,485 patients with metastatic non-small cell lung cancer. Patients were diagnosed between 2000 and 2018 form the Surveillance, Epidemiology, and End Results Program. (A), Clustering presentations. (B), Overall survival probability (OS) curve for 298,485 patients with metastatic non-small cell lung cancer diagnosed between 2000 and 2018. Most of them died within three years after diagnosis. (C), Number of deaths caused by cancers but excluding lung cancer with survival month. (D), Number of deaths caused by non-cancer diseases with survival month. There were very few deaths caused by non-lung cancers and non-cancer diseases three years after diagnosis.