Brief Article
Copyright ©2012 Baishideng Publishing Group Co.
World J Gastroenterol. Aug 21, 2012; 18(31): 4175-4181
Published online Aug 21, 2012. doi: 10.3748/wjg.v18.i31.4175
Figure 1
Figure 1 Observed and adjusted hospital mortality according to surgical volume. Observed hospital mortality rates showed a significant decreasing trend as surgical volume increased (P < 0.001). Adjusted hospital mortality rates were then calculated through multivariate logistic regression with hospital mortality rates as a dependent variable and age and operation type as significant confounder variables.