. Author manuscript; available in PMC: 2017 Dec 14.

Published in final edited form as: Psychoneuroendocrinology. 2013 Oct 16;40:69–75. doi: 10.1016/j.psyneuen.2013.10.002

Table 2.

Wake-time and sampling delay standardized regression coefficients (β) for cortisol measures.

	Total sample (n = 201)		Children (n = 75)		Adolescents (n = 126)

	Wake-time	Sampling delay	Wake-time	Sampling delay	Wake-time	Sampling delay
Awake₀	−.10	.14^†	−.14	.24 ^*	−.08	.08
AUC_AG	−.24 ^*	.03	−.24 ^*	.05	−.26 ^*	.03
AUC_I	−.14^†	−.08	−.18	−.13	−.14	−.06
AUC_TG	−.17 ^*	−.00	−.20	−.02	−.19 ^*	.01
Diurnal slope
Slope_awake	.05	−.12	.04	−.23 ^*	.05	−.06
Slope_max	.22 ^*	−.02	.16	−.05	.24 ^*	.00

Note: β = standardized beta coefficients. Regression models include age, wake-time, and sampling delay; β not shown for age. Wake-time was determined by accelerometer. Sampling delay = absolute difference between wake-time and time of awake₀ sample. Awake₀ = initial cortisol value at wake-time. AUC_AG = area under the curve relative to ground, for awakening response. AUC_I = area under the curve relative to increase, for awakening response. AUC_TG = area under curve relative to ground, for entire diurnal profile. Slope_awake = diurnal slope anchored to awake using regression. Slope_max = diurnal slope anchored to max sample using regression. Bold values indicate statistical significance.

p < .05.

^†

p < .06.