Influence of Obesity on Heart Rate Variability in Nurses with Age and Shift Type as Moderators
Table 3
Moderating effects of age on impact of WC and BMI on HRV.
Variable
HF
LF
LF/HF
VLF
TP
SDNN
Independent variable (: overly large WC)†
-0.45
-0.13
0.040
-0.40
-0.12
0.051
0.02
0.04
0.541
-0.28
-0.10
0.122
-0.22
-0.09
0.179
-31.54
-0.14
0.036
Moderator (: age)
-0.002
-0.01
.934
0.0004
0.002
0.985
0.001
0.03
0.694
0.01
0.03
0.709
-0.03
-0.15
0.068
0.40
0.02
0.774
Interaction term ()
-0.08
-0.21
0.010
-0.06
-0.18
0.030
0.004
0.08
0.334
-0.05
-0.16
0.060
-0.03
-0.11
0.167
-2.04
-0.08
0.343
0.072
0.054
0.014
0.033
0.071
0.025
6.15
4.52
1.14
2.72
6.03
2.05
<.001
.004
.335
.045
.001
.108
Independent variable (: overly high BMI)†
-0.33
-0.10
0.113
-0.33
-0.10
0.099
0.01
0.02
0.764
-0.39
-0.14
0.025
-0.19
-0.08
0.218
-32.88
-0.15
0.023
Moderator (: age)
0.005
0.02
0.808
-0.0003
-0.001
0.988
-0.0003
-0.02
0.843
0.01
0.03
0.699
-0.02
-0.13
0.127
0.34
0.02
0.804
Interaction term ()
-0.10
-0.27
0.001
-0.07
-0.19
0.023
0.01
0.16
0.054
-0.05
-0.17
0.045
-0.04
-0.16
0.052
-2.28
-0.09
0.283
0.078
0.050
0.024
0.044
0.076
0.029
6.73
4.14
1.96
3.67
6.53
2.34
<0.001
0.007
0.121
0.013
<0.001
0.074
is the unstandardized regression coefficient, and is the standardized regression coefficient. † cm for men and cm for women served as the reference group; kg/m2 served as the reference group. Abbreviations: BMI: body mass index; WC: waist circumference; HRV: heart rate variability; HF: high frequency; LF: low frequency; LF/HF: low- to high-frequency power ratio; VLF: very low frequency; TP: total power; SDNN: standard deviation of normal-to-normal interval.
