Reference values for short-term HRV
| Variable | Total sample | Aged ≤45 years | Aged 46–55 years | Aged 55–65 years | Aged >65 years |
|---|---|---|---|---|---|
| N | 371 | 42 | 120 | 160 | 49 |
| TP, ms2 | |||||
| Mean±SD | 1127.33±697.28 | 1425.87±602.81 | 1163.64±587.5 | 1112.14±801.26 | 832.07±532.91 |
| 5th percentile | 356.13 | 786.34 | 463.91 | 345.92 | 317.71 |
| 10th percentile | 441.58 | 850.57 | 568.35 | 419.09 | 326.79 |
| 50th percentile | 972.82 | 1225.39 | 1058.10 | 902.77 | 671.60 |
| LF, ms2 | |||||
| Mean±SD | 241.35±204.92 | 370.77±207.51 | 233.69±200.62 | 221.6±207.04 | 164.69±155.73 |
| 5th percentile | 55.45 | 84.34 | 70.92 | 55.11 | 20.82 |
| 10th percentile | 68.75 | 113.90 | 88.18 | 64.78 | 34.52 |
| 50th percentile | 173.44 | 345.18 | 181.56 | 167.22 | 103.24 |
| LFn, nu | |||||
| Mean±SD | 21.44±10.56 | 25.69±10.61 | 23.48±9.92 | 21.84±10.71 | 18.85±10.66 |
| 5th percentile | 6.40 | 9.93 | 6.68 | 6.20 | 4.86 |
| 10th percentile | 9.65 | 13.43 | 10.49 | 9.82 | 6.05 |
| 50th percentile | 19.51 | 25.33 | 19.95 | 19.50 | 17.46 |
| HF, ms2 | |||||
| Mean±SD | 245.93±230.26 | 348.93±241.48 | 246.33±203.98 | 232.74±245.16 | 199.74±211.14 |
| 5th percentile | 36.64 | 57.37 | 38.64 | 32.09 | 27.07 |
| 10th percentile | 53.87 | 105.26 | 59.18 | 53.96 | 48.57 |
| 50th percentile | 183.97 | 283.00 | 194.54 | 156.30 | 147.58 |
| HFn, nu | |||||
| Mean±SD | 21.85±12.83 | 24.79±13.79 | 22.07±12.7 | 21.37±12.66 | 20.82±12.87 |
| 5th percentile | 4.83 | 5.48 | 5.05 | 4.78 | 4.15 |
| 10th percentile | 7.04 | 8.75 | 7.10 | 6.23 | 6.22 |
| 50th percentile | 19.09 | 20.82 | 18.73 | 18.64 | 18.35 |
| LF/HF | |||||
| Mean±SD | 1.53±1.79 | ||||
| 2.5th percentile | 0.30 | ||||
| 50th percentile | 1.00 | ||||
| 97.5th percentile | 6.50 | ||||
HF, high frequency; HFn, normalised HF; HRV, heart rate variability; LF, low frequency; LFn, normalised LF; TP, total power.