Table 2.
Linear Regression Results on the Association Between Experiencing the Death of a Family Member and HRV and Interaction Effects of Sleep Quality (N = 962)
| RMSSD ln (ms) | HF-HRV ln (ms2) | |||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Model 1 | Model 2 | Model 1 | Model 2 | |||||
| B (95% CI) | p-value | B (95% CI) | p-value | B (95% CI) | p-value | B (95% CI) | p-value | |
| Constant | 3.12 (2.976; 3.265) |
< .001 | 3.097 (2.952; 3.242) |
< .001 | 5.184 (4.887; 5.482) |
< .001 | 5.145 (4.847; 5.444) |
< .001 |
| Experienced a family member’s death | −.127 (−.253; .0002) |
.050 | .059 (−.124; .242) |
.529 | −.254 (−.516; .007) |
.057 | .051 (−.327; .429) |
.793 |
| Poor sleep quality | −.081 (−.158; −.004) |
.039 | −.045 (−.126; .036) |
.274 | −.182 (−.341; −.023) |
.025 | −.123 (−.29; .044) |
.149 |
| Family member’s death x Sleep quality | - | - | −.352 (−.604; −.101) |
.006 | - | - | −.58 (−1.10; −0.06) |
.029 |
| Age | −.014 (−.018; −.011) |
< .001 | −.015 (−.018; −.011) |
< .001 | −.035 (−.042; −.028) |
< .001 | −.035 (−.042; −.028) |
< .001 |
| Women | .024 (−.053; .101) |
.546 | .022 (−.055; .099) |
.576 | .182 (.023; .341) |
.025 | .179 (.021; 0.338) |
.027 |
| Education | −.006 (−.022; .011) |
.498 | −.005 (−.022; .011) |
.507 | −.011 (−.045; .022) |
.508 | −.011 (−.044; .022) |
.516 |
| White | −.191 (−.295; −.086) |
< .001 | −.188 (−.293; −.084) |
< .001 | −.351 (−.567; −.134) |
.002 | −.35 (−.563; −.131) |
.002 |
| Married | −.019 (−.103; .065) |
.660 | −.018 (−.102; .065) |
.665 | −.062 (−.235; .111) |
.483 | −.061 (−.234; .111) |
.486 |
| BMI | −.006 (−.012; −.001) |
.033 | −.007 (−.012; −.001) |
.028 | −.015 (−.027; −.003) |
.016 | −.015 (−.027; −.003) |
.014 |
| Former smoker | .015 (−.074; 0.104) |
.745 | .015 (−.074; .103) |
.747 | .072 (−.111; .255) |
.444 | .071 (−.112; .254) |
.445 |
| Current smoker | .112 (−.01; .233) |
.072 | .105 (−.016; .227) |
.088 | .215 (−.036; .466) |
.093 | .205 (−.046; .456) |
.109 |
| Taking hypertension medication | .039 (−.056; .133) |
.424 | .043 (−.051; .138) |
.367 | .069 (−.127; .265) |
.489 | .077 (−.119; .272) |
.440 |
| Heart disease diagnosis | .12 (−.032; .273) |
.122 | .129 (−.023; .281) |
.097 | .149 (−.166; .463) |
.354 | .162 (−.152; .477) |
.311 |
| Engage in physical activity | .025 (−.064; 0.115) |
.579 | .032 (−.057; .121) |
.477 | .064 (−.12; .249) |
.493 | .076 (−.108; .26) |
.419 |
Notes. RMSSD = root mean squared successive differences; HF-HRV = high frequency HRV; Ln = natural logged; Ms = milliseconds; BMI = body mass index; B = unstandardized beta coefficient. All continuous variables were centered at their mean; All HRV measures were natural log-transformed.