Correlations of T cell activation measures with cortisol measuresa.

aThe values shown are pairwise Pearson correlation coefficients between cortisol measures ((log10 nmol/L) and cluster of differentiation (CD) 38 expression on T lymphocytes, measured as mean florescent intensity (MFI), with 95 percent confidence intervals in parentheses, followed by P-values for the corresponding correlation coefficients. The N used to calculate the coefficients is 101–109.bCortisol awakening response was calculated by subtracting waking cortisol from 30 minute post-waking cortisol, and was typically positive.cCortisol slope was calculated by subtracting waking cortisol from bedtime cortisol, and was typically negative.