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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Psychoneuroendocrinology. 2011 Aug 20;37(4):499–508. doi: 10.1016/j.psyneuen.2011.07.019

Table 3.

Cortisol concentrations of received saliva samples from Add Health pretest (n=122)1 and reliability based on IIV Study (n=27)

Cortisol Sample Mean (ug/dl) Std Min P25 P75 Max IIV IIV
ICC CV
Wake .43 .32 .11 .27 .49 3.00 .06 73.0
+30 min .50 .25 .12 .32 .63 1.42 .25 97.2
Bedtime .09 .13 .01 .03 .10 .76 .43 29.6
1

Calculations are based on data from respondents who returned all three requested samples, and for whom timeliness of collection was calculable. Values ≤.1 or ≥ 5.0 were excluded from analyses. Calculations based on more observations (i.e., data not subject to these exclusion criteria) yielded similar patterns.