how do you measure cortisol in the morning when cortisol level is increasing how long should the variability be measured? is cortisol measured in the morning how to compare differences when the cortisol level decreases? when is cortisol a variable why do cortisol levels decrease during the day how do you compare the variability of cortisol what is the difference between a measure and an analysis of cortisol how to compare cortisol levels between groups how to compare the differences of variables in cortisol how to compare difference between groups when measured variables have decreasing trend what variable has a decreasing trend when measured? why is the cortisol trend decreasing cortisol is increasing trend when compared to the baseline why is cortisol decreasing? when cortisol level decreases does cortisol decrease when measured does the cortisol measure decreasing when does cortisol decrease when cortisol levels decrease what should be the difference between groups