Table 2.
Frequency and time domain indices of HRV recorded in supine position of subjects in various groups
|
Parameters |
Group 1 |
Group 2 |
Group 3 |
p values |
|---|---|---|---|---|
| (n = 45) | (n = 27) | (n = 36) | ||
|
FDI |
|
|
|
|
| TP (ms2) |
980.80 ± 376.80 |
736.57 ± 245.60** |
425.30 ± 186.40***,### |
<0.0001 |
| LF (ms2) |
390.40 ± 186.70 |
382.64 ± 180.40 |
254.30 ± 130.50**,## |
0.0006 |
| HF (ms2) |
548.30 ± 256.80 |
325.20 ± 136.10*** |
142.40 ± 78.90***,### |
<0.0001 |
| LFnu |
40.32 ± 19.90 |
53.90 ± 20.30* |
60.56 ± 24.70*** |
0.0004 |
| HFnu |
57.12 ± 21.80 |
46.05 ± 18.10* |
35.28 ± 12.08***,# |
<0.0001 |
| LF:HF ratio |
1.36 ± 0.65 |
2.34 ± 1.05** |
3.76 ± 1.40***,### |
<0.0001 |
|
TDI |
|
|
|
|
| Mean RR (s) |
0.859 ± 0.152 |
0.804 ± 0.140 |
0.700 ± 0.120 ***,# |
<0.0001 |
| RMSSD (ms) |
34.10 ± 15.30 |
28.90 ± 11.30 |
19.25 ± 7.45***,## |
<0.0001 |
| SDNN (ms) |
32.40 ± 17.20 |
28.50 ± 12.20 |
20.10 ± 9.20**,# |
0.0005 |
| NN50 |
26.40 ± 11.20 |
22.64 ± 10.70 |
17.05 ± 7.80***,# |
0.0003 |
| pNN50 | 8.90 ± 3.10 | 7.45 ± 2.50 | 5.10 ± 1.80***,## | <0.0001 |
Data presented are mean ± SD; Data of all parameters listed in this table are nonparametric except Mean RR. Group 1: Normotensive subjects with normal BMI; Group 2: Prehypertensive subjects with normal BMI; Group 3: Prehypertensive subjects with higher BMI; The * mark indicates comparison with normotensive subjects with normal BMI and the # mark indicates comparison with prehypertensive subjects with normal BMI. * p < 0.05; ** p <0.01; *** p <0.001; # p < 0.05; ## p <0.01; ### p <0.001.