ALB and neoplasm: The multivariate logistic regression analysis showed that age [OR 1.053 (95% CI 1.032–1.073, P < 0.001)], operation time [OR 1.003 (95% CI 1.001–1.005, P = 0.013)] and lower postoperative albumin [OR 0.946 (95% CI 0.903–0.990, P = 0.018)] were independent predictors of postoperative pulmonary imaging abnormalities for patients underwent craniotomy due to tumor (Table 5).