MKI67 and neoplasm: Logistic regression analysis confirmed higher tumor grade (OR 1.740, 95%CI 1.185-2.556, P=0.005) and Ki-67 ≥20% (OR 2.024, 95%CI 1.062-3.857, P=0.032) as independent factors correlated with 1q/19p single polysomy (Table 3).