Table 6.

Descriptive Statistics for the Absolute Cortisol Levels at T1 to T4, Cortisol Reactivity, and Circadian Rhythm.

Cortisol Levels	MD				TA
	M	SD	Min	Max	M	SD	Min	Max
T1	0.13	0.09	0.05	0.48	0.10	0.05	0.04	0.26
T2	0.12	0.08	0.06	0.46	0.10	0.04	0.04	0.24
T3	0.32	0.29	0.07	1.5	0.29	0.19	0.06	0.68
T4	0.13	0.20	0.04	1.3	0.09	0.05	0.04	0.24
T1–T2 cortisol change	−0.00	0.07	−0.15	0.22	−0.01	0.04	−0.10	0.08
T2–T4 cortisol change	0.00	0.21	−0.30	1.17	−0.01	0.04	−0.10	0.08
T3–T4 cortisol change	−0.19	0.21	−1.2	0.06	−0.20	0.18	−0.56	0.06

Note: Negative values for ug/dL (micrograms per deciliter) reflect a decrease in cortisol levels. MD = math disability; TA = typically achieving.