Table 2.
Resting values of key autonomic indices from RR interval variability in normal weight (NW) and overweight/obese children (OW/OB).
| Variables | NW | OW/OB | Significance |
|---|---|---|---|
| Alpha index (ms/mmHg) | 28.0 ± 19.0 | 24.2 ± 13.2 | 0.203 |
| RR interval (ms) | 849.9 ± 118.8 | 874.2 ± 125.8 | 0.304 |
| RR variance (ms2) | 4806.2 ± 5381.2 | 5894.5 ± 6311.5 | 0.340 |
| RR LF a (ms2/Hz) | 1199.1 ± 1372.7 | 2423.9 ± 3635.9 | 0.166 |
| RR HF a (ms2/Hz) | 2365.3 ± 3824.9 | 2423.9 ± 3635.9 | 0.934 |
| RR LF nu (-) | 39.8 ± 20.4 | 42.0 ± 17.9 | 0.534 |
| RR HF nu (-) | 53.0 ± 21.1 | 48.6 ± 18.3 | 0.235 |
| RR LF/HF (-) | 1.27 ± 1.75 | 1.28 ± 1.52 | 0.976 |
| RR LF f (Hz) | 0.10 ± 0.03 | 0.10 ± 0.02 | 0.374 |
| RR HF f (Hz) | 0.30 ± 0.07 | 0.32 ± 0.06 | 0.113 |
| p_0v (-) | 15.6 ± 9.9 | 17.4 ± 12.6 | 0.409 |
| Resp HF f (Hz) | 0.31 ± 0.06 | 0.33 ± 0.06 | 0.139 |
| SAP Mean (mmHg) | 106.1 ± 12.3 | 113.6 ±11.1 | 0.001 |
| SAP total power (mmHg2) | 24.2 ± 18.9 | 32.1 ± 25.2 | 0.059 |
Abbreviations; RR = interval between successive R waves; LF = low frequency; a = raw value; HF = high frequency; f = frequency; Hz = Hertz; p = beat sequence; Resp = respiration; SAP = systolic arterial pressure.