Table 3.
Distribution characteristics of heart rate variability indices urban and forest environments.
| lnHF | ln(LF/HF) | |||||
|---|---|---|---|---|---|---|
| Urban | Forest | Difference(p-value) | Urban | Forest | Difference (p-value) | |
| Mean | 3.93 | 4.33 | p < 0.01 | 2.16 | 1.96 | p < 0.01 |
| Median | 3.96 | 4.27 | p < 0.01 | 2.18 | 1.95 | p < 0.01 |
| SD | 1.06 | 1.16 | p = 0.06 | 0.62 | 0.63 | p = 0.55 |
| CV (%) | 27.0 | 26.74 | p = 0.83 | 28.5 | 32.1 | p < 0.01 |
| Q1 | 3.17 | 3.56 | p < 0.01 | 1.74 | 1.53 | p < 0.01 |
| Q3 | 4.65 | 5.11 | p < 0.01 | 2.54 | 2.39 | p < 0.01 |
| IQR | 1.49 | 1.55 | p = 0.62 | 0.80 | 0.86 | p = 0.34 |
| Skewness | −0.03 | 0.13 | p = 0.24 | 0.10 | 0.18 | p = 0.47 |
| Kurtosis | −0.30 | −0.13 | p = 0.43 | −0.15 | −0.24 | p = 0.64 |
SD, standard deviation; CV, coefficient of variation; Q1, quartile 1 (25th percentile); Q3, quartile 3 (75th percentile); IQR, interquartile range; Skewness, a measure of symmetry of distribution; Kurtosis, a measure of whether the distribution curve is peaked (positive) or flat (negative) relative to the normal distribution. Differences between urban and forest environments were tested by a permutation test.