Fig. 1.

Kaplan–Meier survival analysis of the 17 patients with advanced non-small cell lung cancer who had received nivolumab and discontinued it due to reasons other than disease progressions. a The duration of nivolumab treatment and survival after treatment discontinuation. The blue bars indicate the duration of nivolumab treatment, and orange bars indicate the survival after the discontinuation of nivolumab treatment. Black diamonds indicate the time of tumor progression, and arrows indicate the alive patients by the last follow-up. Patient numbers at the vertical axis heading correspond to those in the first column of Table 1. b Progression-free survival curve of the 17 patients