Concordance between the response evaluation criteria in solid tumors version 1.1 and the immune-related response criteria in patients with non-small cell lung cancer treated with nivolumab: a multicenter retrospective cohort study

Purpose The immune-related response criteria (irRC) were proposed to incorporate pseudo-progression. However, the association between the irRC and overall survival (OS) has yet to be evaluated in non-small cell lung cancer (NSCLC). Therefore, the purpose of this study is to evaluate the concordance between the response evaluation criteria in solid tumors (RECIST) version 1.1 and the irRC in patients with NSCLC treated with nivolumab, as well as, to determine the relationship between these two response criteria and OS.