Fig. 3

Spearman’s rank correlation coefficients for age and the changes in MAP (a) and CO (b). Correlations between age and the changes in MAP (correlation coefficient, 0.056; p = 0.633) and CO (correlation coefficient, 0.191; p = 0.100). Although the correlation coefficient and p value were calculated using Spearman’s rank correlation, the linear regression line is presented in this graph. ΔMAP, change in the mean arterial pressure; ΔCO, change in the cardiac output. MAP, mean arterial pressure; CO, cardiac output