Table 2.
1 | 2 | 3 | 4 | 5 | 6 | 7 | |
---|---|---|---|---|---|---|---|
HRV measures | |||||||
1. LF | – | ||||||
2. HF | .81** | – | |||||
3. LF/HF ratio | −.29** | −.62** | – | ||||
Cortisol measures | |||||||
4. AUCAG | .05 | .05 | −.07 | – | |||
5. AUCI | .01 | .03 | .01 | .02 | – | ||
6. SlopeMax | −.11 | −.09 | −.08 | −.73** | −.38** | – | |
7. Maximum | .08 | .07 | −.06 | .81** | .39** | −.92** | – |
Covariates | |||||||
Age | .07 | −.06 | .15* | −.00 | .13 | .02 | .03 |
Sex | −.30** | −.23** | .09 | .10 | .13 | −.08 | .15* |
Adrenarche | .08 | −.01 | .02 | −.02 | .09 | .04 | .00 |
BMI Z-score | −.07 | −.05 | −.06 | −.06 | −.12 | .13 | −.07 |
Parent education | −.04 | .00 | −.04 | .03 | .08 | .06 | −.04 |
Household income | .01 | .03 | −.03 | .08 | .09 | −.07 | .08 |
Sleep duration | .07 | .11 | −.03 | −.05 | −.18* | −.01 | −.09 |
Wake-time | .18* | .15* | −.03 | −.19** | −.11 | .14* | −.19* |
Compliance | .07 | .07 | −.04 | .01 | −.02 | −.04 | .00 |
Note: AUCAG = area under curve relative to ground. AUCI = area under curve relative to increase. SlopeMax = diurnal slope anchored to max sample using regression. LF = low frequency. HF = high frequency. Bold values indicate significance:
p < 0.05;
p < 0.01.