Table 3.
Singular versus inter-relation model comparisons in healthy men.
| HRV | Cortisol | Singular models HRV | Singular models cortisol | Inter-relation models | Model comparison | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| βhrv | F | R2 | βcort | F | R2 | βhrv | βcort | βint | F | R2 | ΔF | ΔR2 | ||
| VLF | 0.129 | 1.231 | 0.003 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | 0.034 | 0.082 | -0.013 | 0.128 | 0.024 | 0.014 | 0.418 | -0.024 | 0.014 | 0.000 | |
| CAR AUCg | – | – | – | 0.091 | 0.610 | -0.005 | 0.129 | 0.093 | 0.059 | 0.719 | -0.012 | 0.254 | 0.003 | |
| Diurnal AUCg | – | – | – | 0.131 | 1.279 | 0.004 | 0.131 | 0.148 | 0.066 | 1.029 | 0.001 | 0.315 | 0.004 | |
| DCS | – | – | – | -0.095 | 0.658 | -0.005 | 0.130 | -0.103 | -0.076 | 0.825 | -0.007 | 0.415 | 0.006 | |
| LF | -0.136 | 1.372 | 0.005 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | -0.141 | 0.054 | -0.010 | 0.509 | -0.020 | 0.006 | 0.000 | |
| CAR AUCg | – | – | – | – | – | – | -0.132 | 0.077 | 0.035 | 0.647 | -0.015 | 0.088 | 0.001 | |
| Diurnal AUCg | – | – | – | – | – | – | -0.115 | 0.117 | -0.026 | 0.750 | -0.010 | 0.048 | 0.001 | |
| DCS | – | – | – | – | – | – | -0.119 | -0.052 | -0.038 | 0.584 | -0.017 | 0.085 | 0.001 | |
| HF | 0.042 | 0.131 | -0.012 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | 0.037 | 0.057 | -0.041 | 0.110 | -0.037 | 0.088 | 0.001 | |
| CAR AUCg | – | – | – | – | – | – | 0.044 | 0.072 | 0.082 | 0.386 | -0.026 | 0.459 | 0.006 | |
| Diurnal AUCg | – | – | – | – | – | – | 0.009 | 0.065 | 0.237 | 1.773 | 0.030 | 3.827 | 0.050 | |
| DCS | – | – | – | – | – | – | 0.009 | -0.074 | -0.038 | 0.246 | -0.032 | 0.078 | 0.001 | |
| LF/HF | -0.108 | 0.855 | -0.002 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | -0.108 | 0.050 | 0.022 | 0.315 | -0.029 | 0.022 | 0.000 | |
| CAR AUCg | – | – | – | – | – | – | -0.098 | 0.030 | -0.078 | 0.518 | -0.020 | 0.272 | 0.004 | |
| Diurnal AUCg | – | – | – | – | – | – | -0.069 | 0.053 | -0.147 | 1.047 | 0.002 | 1.066 | 0.014 | |
| DCS | – | – | – | – | – | – | -0.101 | -0.012 | 0.114 | 0.636 | -0.015 | 0.654 | 0.009 | |
| SDNN | 0.111 | 0.910 | -0.001 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | 0.093 | 0.036 | -0.069 | 0.407 | -0.025 | 0.310 | 0.004 | |
| CAR AUCg | – | – | – | – | – | – | 0.124 | 0.068 | 0.091 | 0.698 | -0.012 | 0.555 | 0.008 | |
| Diurnal AUCg | – | – | – | – | – | – | 0.141 | 0.154 | 0.131 | 1.356 | 0.014 | 1.283 | 0.017 | |
| DCS | – | – | – | – | – | – | 0.092 | -0.072 | -0.136 | 1.007 | 0.000 | 1.201 | 0.016 | |
| SDANN | 0.097 | 0.695 | -0.004 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | 0.077 | 0.043 | -0.092 | 0.421 | -0.024 | 0.555 | 0.008 | |
| CAR AUCg | – | – | – | – | – | – | 0.109 | 0.079 | 0.068 | 0.547 | -0.019 | 0.309 | 0.004 | |
| Diurnal AUCg | – | – | – | – | – | – | 0.138 | 0.155 | 0.114 | 1.139 | 0.006 | 0.951 | 0.013 | |
| DCS | – | – | – | – | – | – | 0.078 | -0.068 | -0.158 | 1.090 | 0.004 | 1.652 | 0.022 | |
| rMSSD | 0.156 | 1.813 | 0.011 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | 0.160 | 0.013 | 0.037 | 0.631 | -0.015 | 0.089 | 0.001 | |
| CAR AUCg | – | – | – | – | – | – | 0.148 | 0.061 | 0.045 | 0.796 | -0.008 | 0.118 | 0.002 | |
| Diurnal AUCg | – | – | – | – | – | – | 0.164 | 0.144 | 0.069 | 1.290 | 0.012 | 0.341 | 0.005 | |
| DCS | – | – | – | – | – | – | 0.175 | -0.119 | 0.114 | 1.066 | 0.003 | 0.845 | 0.011 | |
| pNN50 | 0.244* | 4.626 | 0.047 | – | – | – | – | – | – | – | – | – | – | |
| CAR AUCi | – | – | – | – | – | – | 0.247* | 0.016 | 0.016 | 1.518 | 0.021 | 0.014 | 0.000 | |
| CAR AUCg | – | – | – | – | – | – | 0.249* | 0.000 | 0.147 | 2.085 | 0.042 | 1.234 | 0.016 | |
| Diurnal AUCg | – | – | – | – | – | – | 0.235* | 0.070 | 0.154 | 2.565 | 0.060 | 1.469 | 0.019 | |
| DCS | – | – | – | – | – | – | 0.238* | -0.079 | -0.006 | 1.681 | 0.027 | 0.002 | 0.000 | |
HRV, heart rate variability; VLF, very low frequency; LF, low frequency; HF, high frequency; SDNN, standard deviation of all R-R intervals; SDANN, standard deviation of the average R-R intervals calculated over 5 min; rMSSD, root mean square of successive differences; pNN50, percent of R-R intervals differing more than 50 ms from each other; CAR, cortisol awakening response; AUCi, area under the curve with respect to increase; AUCg, area under the curve with respect to ground; DCS, diurnal cortisol slope; βhrv, standardized beta coefficient for HRV measure; βcort, standardized beta coefficient for cortisol measure; βint, standardized beta coefficient for the interaction term. Bold values indicate significance: *p < 0.05.