MKI67 and non-small cell lung carcinoma: Subgroup analysis in this study showed that higher Ki-67 expression indicated a poorer outcome in Asian NSCLC patients compared with non-Asian patients (HR 1.97, 95 % CI 1.43–2.71 vs. HR 1.37, 95 % CI 1.15–1.64 for OS and HR 2.78, 95 % CI 1.78–4.34 vs. HR 1.83, 95 % CI 1.09–3.06 for DFS).