Table 1.
Heart rate variability comparison between computer vs. board playing (n = 27).
| Variable | Board Median (IQR) |
Computer Median (IQR) |
p-Value | Effect Size |
|---|---|---|---|---|
| MeanRR | 706.98 (122.48) | 777.86 (136.61) | 0.055 | −0.370 |
| SDNN | 49.45 (55.52) | 48.98 (33.77) | 0.456 | −0.143 |
| pNN50 | 18.21 (19.10) | 17.92 (24.39) | 0.387 | −0.166 |
| RMSSD | 38.27 (22.91) | 39.94 (32.34) | 0.143 | −0.282 |
| HFn | 39.19 (18.00) | 38.24 (28.43) | 0.456 | −0.143 |
| LFn | 60.66 (17.95) | 61.67 (28.44) | 0.471 | −0.139 |
| LF/HF | 1.55 (1.41) | 1.61 (2.36) | 0.829 | −0.004 |
| Total Power | 2123.53 (2952.96) | 1914.01 (2883.11) | 0.471 | −0.139 |
| SD1 | 27.11 (16.24) | 28.28 (22.90) | 0.136 | −0.287 |
| SD2 | 65.30 (31.45) | 59.04 (37.05) | 0.239 | −0.227 |
| SampEn | 1.64 (0.39) | 1.59 (0.57) | 0.792 | −0.050 |
Effect size correspond to “r”. IQR: interquartile range; RR: time between RR intervals in milliseconds; SDNN: standard deviation of all normal to normal RR intervals; pNN50: the percentage of intervals >50 ms different from preceding interval; RMSSD: root mean square of successive RR interval differences; LF/HF: ratio low frequency (LFn) (ms2)/high frequency (HFn) (ms2); Total Power: the sum of all spectra; SD1: dispersion, standard deviation, of points perpendicular to the axis of line-of-identity in the Poincaré plot; SD2: dispersion, standard deviation, of points along the axis of line-of-identity in the Poincaré plot; SampEn: sample entropy.