Influence of Obesity on Heart Rate Variability in Nurses with Age and Shift Type as Moderators
Table 4
Moderating effects of shift type on impact of WC and BMI on HRV.
Variable
HF
LF
LF/HF
VLF
TP
SDNN
Independent variable (: overly large WC)†
-0.39
-0.11
0.138
-0.33
-0.10
0.186
0.02
0.04
0.578
-0.17
-0.06
0.436
-0.21
-0.08
0.288
-29.49
-0.13
0.097
Moderator (: fixed day shift)
0.02
0.01
0.935
0.09
0.03
0.747
0.03
0.06
0.447
0.18
0.06
0.437
-0.11
-0.04
0.595
9.70
0.04
0.617
Interaction term ()
-0.51
-0.10
0.293
-0.51
-0.10
0.263
0.01
0.01
0.875
-0.56
-0.13
0.163
-0.27
-0.07
0.445
-14.55
-0.04
0.658
.032
.028
.008
.022
.023
.022
2.62
2.30
0.63
1.78
1.85
1.78
0.052
0.078
0.599
0.152
0.138
0.152
Independent variable (: overly high BMI)†
-0.21
-0.06
0.395
-0.28
-0.09
.236
-0.01
-0.02
0.787
-0.29
-0.110
.154
-0.19
-0.08
0.316
-32.18
-0.14
0.059
Moderator (: fixed day shift)
0.01
0.004
0.961
-0.02
-0.01
0.942
0.01
0.02
0.823
0.14
0.05
0.566
-0.19
-0.07
0.376
6.17
0.03
0.757
Interaction term ()
-0.49
-0.10
0.298
-0.23
-0.05
0.608
0.06
0.10
0.303
-0.39
-0.09
0.315
-0.07
-0.02
0.851
-5.68
-0.02
0.859
.019
.015
.010
.026
.015
.023
1.53
1.20
0.81
2.13
1.20
1.85
0.208
0.311
0.487
0.097
0.311
0.138
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.
