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Comparison of OS and PFS time between Ki-67 expression >90 and ≤90% by log-rank test. Univariate analysis revealed that high expression of Ki-67 (>90%) was associated with a shorter OS (P=0.037) and PFS (P=0.039) times compared with low expression of Ki-67 (≤90%). OS, overall survival; PFS, progression-free survival.
