Table 1.
Demographic data and differences between groups at baseline.
| Variable | Exercise Group Mean (SD) | Control Group Mean (SD) | Value of Contrast | p-valuea |
|---|---|---|---|---|
| Sample size | 28 | 27 | ||
| Age (years) | 54.04 (9.96) | 53.41 (9.92) | 0.234 | 0.816 |
| SDNN (ms) | 22.98 (8.12) | 26.61 (10.28) | −1.455 | 0.152 |
| RMMSD (ms) | 21.18 (10.51) | 22.97 (12.88) | −0.565 | 0.574 |
| ln Stress Score | 3.61 (0.33) | 3.47 (0.44) | 1.261 | 0.213 |
| SD1 (ms) | 15.01 (7.44) | 16.26 (9.12) | −0.561 | 0.577 |
| SD2 (ms) | 28.55 (9.49) | 33.59 (12.39) | −1.697 | 0.096 |
| SD1/SD2 | 0.52 (0.15) | 0.47 (0.16) | 1.251 | 0.216 |
| HFD | 1.33 (0.12) | 1.37 (0.12) | −0.915 | 0.365 |
ap-values of t-test for independent sample to compare differences between groups at baseline.
SDNN: standard deviation of all normal to normal RR intervals; ln stress score: natural logarithm of the 1000*1/SD2; SD1: standard deviation of points perpendicular to the axis of line-of-identity in the Poincaré plot; SD2: standard deviation, of points along the axis of line-of-identity in the Poincaré plot; SD1/SD2: ratio between SD1 and SD2; HFD: Higuchi Fractal Dimension.