Fig. 2

Cavity obliteration or size changes and survival. Kaplan–Meier survival curves of patients with cavity obliteration (black), persistent cavity with size reduction (red), and persistent cavity without size reduction (blue). The 5-year mortality rates in patients with cavity obliteration, persistent cavity with size reduction, and persistent cavity without size reduction were 95.6% (95% CI, 89.8–100%), 72.1% (95% CI, 56.7–91.6%), and 65.3% (95% CI, 49.1–87.0%), respectively.