The first- and total-order sensitivity indices for Case 1 were calculated from 20, 480 4-tuple samples and include a 95% confidence interval.

The indices for Case 2 were calculated from 24, 576 5-tuple samples. First-order indices characterize a parameters individual contribution to the variation in the model output. Total-order indices characterize a parameters total contribution to the variation in the model output which includes higher order interactions.