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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Psychoneuroendocrinology. 2013 Apr 29;38(10):2163–2172. doi: 10.1016/j.psyneuen.2013.04.003

Table 2.

Standardized variance components for rates of change and coefficients of variation

Correlation
 Variance Components
Measure rmz (95% CI) rdz (95% CI) A (95% CI) C (95% CI E (95% CI)
At Home (Days 1 & 2)
Wake to Evening* .16 (.01; .30) .09 (.02; .25) .16 (.01; .49) -- .84 (.70; .99)
Wake to Wake +30 .04 (.00; .12) .10 (.02; .24) -- .04 (.00; .12) .96 (.88; 1.0)
Wake +30 to Evening .23 (.08; .37) .07 (.02; .19) .23 (.08; .37) -- .77 (.63; .92)
Coefficient of Variation .17 (.02; .31) .23 (.09; .38) -- .17 (.02; .31) .83 (.69; .98)
Day of Testing
Wake to Evening .29 (.15; .42) .06 (.01; .19) .29 (.15; .42) -- .71 (.58; .85)
Wake to Wake +30 .15 (.04; .28) .07 (.01; .19) .15 (.04; .28) -- .85 (.72; .96)
Wake +30 to Evening* .28 (.14; .41) .15 (.02; .31) .28 (.14; .41) -- .72 (.59; .86)
Coefficient of Variation .08 (.01; .20) .12 (.02; .25) -- .08 (.01; .20) .92 (.80; .99)
*

Results from AE models are presented in cases where the shared environment (C) was positive, but nevertheless accounted for less than 5 percent of the phenotypic variance. rmz = Monozygotic twin correlation; rdz = Dizygotic correlation; A = Additive genetic influences; C = Shared environmental influences; E = Unique environmental influences.