Table 3.
Mixed model Type III t-test comparisons of cortisol levels in high and low risk groups at five different time points.
| RISK GROUP | t-tests of cortisol levels at different time points | ||||
|---|---|---|---|---|---|
|
| |||||
| Awakening | Awake plus 30 min | 1000 h | 1500 h | Bedtime | |
| High (4,3,) vs low childhood disadvantage (0) (df = 125) | 0.023; p = 0.98 | 1.898; p = 0.06 | 0.183; p = 0.86 | 0.162; p = 0.87 | 0.464; p = .64 |
| Low vs high AFQT (age 20) (df = 112) | 1.171; p = 0.24 | 1.960; p = 0.06 | 1.583; p = 0.12 | 2.045; p = .05 | 3.15; p = .002 |
| Low vs high adult Socioeconomic Status (df 120) | 0.789; p = 0.43 | 2.836; p = 0.006 | 1.210; p = .23 | 1.821; p = .07 | 2.78; p = .006 |
| Smoking vs Not smoking (df = 723) | 0.074; p = 0.94 | 3.526; p = 0.0005 | 2.500; p = 0.02 | 3.313; p = .001 | 4.964; p < .0001 |
For each predictor, the high risk group is coded as the high score. Cortisol values at each time point are averaged across the three days. p values reported are two-tailed. Significant differences are bolded.