TKFC and neoplasm: Univariate logistic regression analysis showed that DARP (odds ratio [OR] 6.231, 95% confidence interval [CI] 2.113–18.374; P = 0.001), DAK (OR 5.76, 95% CI 2.029–16.35; P = 0.001), tumor size (OR 5.25, 95% CI 1.834–15.03, P = 0.002), and age (OR 3.59, 95% CI 1.109–11.619; P = 0.033) were significantly correlated with operating time (Fig. 2).