MKI67 and metastasis: KI‐67 index (>50%: SHR 1.71, 95% CI 1.04‐2.80; ≤50% as a reference), number of metastatic organ sites (≥2 sites: SHR 2.28, 95% CI 1.22‐4.27; 1 site as a reference), lung metastasis (metastasis: SHR 2.66, 95% CI 1.24‐5.70; no metastasis as a reference), and hilar/mediastinal lymph node metastasis (metastasis: SHR 1.70, 95% CI 1.02‐2.84; no metastasis as reference) remained as independent prognostic factors for brain metastasis in the competing risks model (Table 2) and were used to construct a nomogram.