Fig. 2.

Kaplan–Meier survival curve analysis of risk factors’ impact on the OS of BM patients in NSCLC, which were stratified according to age (a), race (b), marital status (c), sex (d), tumor histology (e), laterality (f), T stage (g), N stage (h), grade (i), brain metastases (j), liver metastases (k), and lung metastases (l). OS overall survival, BM bone metastases, NSCLC non-small cell lung cancer, ADC adenocarcinoma, SCC squamous cell carcinoma, Brain Met brain metastases, Liver Met liver metastases, Lung Met lung metastases, y years