Table 1.

Between and within season correlations for salivary Cortisol concentrations collected on two sets of consecutive days in the summer and fall. Samples were collected at waking, 30-minutes post waking, 11am, 4pm and bedtime. We calculated the area under the curve (AUC), AMChange (difference between 30 minutes post waking and waking samples) and the diurnal Index (DI, difference between 30-minutes post waking and bedtime samples). Results are presented as the Pearson's correlation coefficient, 95% confidence intervals and the p value.

Within the Summer	Correlation [r]	Lower 95% CI	Upper 95% CI	p value
AUC	0.54	0.19	0.76	0.005
AM Change	0.32	−0.06	0.63	0.099
DI	0.51	0.16	0.74	0.007
Waking	0.11	−0.28	0.47	0.587
30 min post-waking	0.53	0.19	0.76	0.004
11:00 AM	0.37	−0.01	0.66	0.054
4:00 PM	0.32	−0.09	0.64	0.118
Bedtime	0.35	−0.03	0.65	0.071
Within the Fall
AUC	0.87	0.72	0.94	<0.001
AM Change	0.65	0.33	0.83	0.001
DI	0.75	0.52	0.88	<0.001
Waking	0.91	0.80	0.96	<0.001
30 min post-waking	0.83	0.65	0.92	<0.001
11:00 AM	0.61	0.28	0.81	0.001
4:00 PM	0.55	0.20	0.77	0.004
Bedtime	0.71	0.43	0.86	<0.001
Between Season
AUC	−0.28	−0.61	0.13	0.179
AM Change	−0.61	−0.81	−0.29	0.001
DI	0.27	−0.13	0.60	0.180