Comparison of Heart Rate Variability in Thai Older Adults with Hypertension, Pre-Hypertension, and Normotension
Table 4
Multiple regression analysis for BP parameters and related HRV indices among participants.
Dependent variable
SBP
DBP
PP
MAP
β
SE
value
β
SE
value
β
SE
value
β
SE
value
Time domain
SDNN (ms)
−0.53
0.39
0.18
−0.35
0.20
0.21
−0.24
0.31
0.37
−0.14
0.24
0.63
RMSSD
−0.01
0.08
0.88
−0.08
0.04
0.54
0.02
0.06
0.83
−0.18
0.05
0.21
pNN50 (%)
1.37
0.61
0.12
0.09
0.31
0.81
1.05
0.47
0.11
−0.49
0.37
0.23
Frequency domain
LF power (ms2)
0.00
0.01
0.63
0.15
0.01
0.49
0.03
0.01
0.88
0.14
0.01
0.53
HF power (ms2)
−0.06
0.02
0.01
−0.26
0.01
0.55
−1.25
0.02
0.01
0.31
0.01
0.49
LF/HF ratio
−2.99
1.71
0.08
−0.01
0.88
0.92
−0.33
1.32
0.05
0.03
1.05
0.82
R-squared
0.297
0.192
0.518
0.137
Adjusted R-squared
0.223
0.106
0.191
0.047
Analysis was performed using a multiple regression method. .β, standardized beta; SE, standard error; SBP, systolic blood pressure; DBP, diastolic blood pressure SDNN, standard deviation of NN intervals; pNN50, percentage of successive RR intervals that differ by more than 50 ms; LF power, low frequency; HF power, high frequency.
