Table 5.
Summary Statistics and Variance Components Estimates of Genetic and Environmental Effects for Day of Testing Measures of DHEAS Adjusted for Age
| Measure | Mean DHEAS Levels in ng/ml (SD) |
Mean Time of DHEAS Collection (SD) |
rMZ | 95% CI | rDZ | 95% CI | A | 95% CI | C | 95% CI | E |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Waking | 6.41 (0.05) | 0589h (0.78) | 0.35 | (0.22; 0.47) | 0.22 | (0.09; 0.35) | 0.26 | (−0.10; 0.61) | 0.09 | (−0.20; 0.37) | 0.65 |
| Awake +30 | 5.57 (0.06) | 0644h (0.87) | 0.41 | (0.28; 0.52) | 0.27 | (0.13; 0.38) | 0.28 | (−0.04; 0.61) | 0.12 | (−0.15; 0.38) | 0.59 |
| 10am | 5.40 (0.05) | 0973h (0.58) | 0.34 | (0.21; 0.46) | 0.16 | (0.03; 0.29) | 0.37 | (0.02; 0.69) | −0.03 | (−0.28; 0.26) | 0.66 |
| 3pm | 5.42 (0.05) | 1493h (0.98) | 0.38 | (0.24; 0.5) | 0.19 | (0.06; 0.33) | 0.38 | (0.03; 0.71) | 0 | (−0.27; 0.29) | 0.62 |
| Bedtime | 5.31 (0.05) | 2058h (4.67) | 0.34 | (0.19; 0.46) | 0.18 | (0.05; 0.31) | 0.32 | (−0.05; 0.67) | 0.01 | (−0.26; 0.30) | 0.66 |
| Mean | 5.75 (0.05) | 0.42 | (0.3; 0.53) | 0.26 | (0.12; 0.39) | 0.32 | (−0.02; 0.66) | 0.10 | (−0.19; 0.37) | 0.58 |
Bold values indicate significant estimate
rMZ = Monozygotic twin correlation; rDZ = Dizygotic twin correlation
A = Estimate of broad sense heritability, 2(rMZ - rDZ)
C = Estimate of shared environmental effects, 2*rMZ - rDZ
E = Estimate of unique environmental effects 1 – rMZ