Table 2.
Heart rate variability comparison between computer vs. board playing in participants who are not familiarized playing with computer (n = 13).
| Variable | Board Median (IQR) |
Computer Median (IQR) |
p-Value | Effect Size |
|---|---|---|---|---|
| MeanRR | 696.63 (98.56) | 767.55 (132.64) | 0.075 | −0.494 |
| SDNN | 50.28 (24.63) | 49.16 (30.49) | 0.701 | −0.106 |
| pNN50 | 19.58 (22.74) | 25.98 (21.73) | 0.249 | −0.320 |
| RMSSD | 42.01 (24.34) | 45.04 (39.40) | 0.028 | −0.610 |
| HFn | 41.82 (15.17) | 47.24 (33.53) | 0.249 | −0.320 |
| LFn | 57.90 (14.94) | 51.62 (33.58) | 0.279 | −0.307 |
| LF/HF | 1.38 (0.89) | 1.09 (2.11) | 0.807 | −0.184 |
| Total Power | 2496.56 (2530.04) | 1914.01 (3222.14) | 0.471 | −0.048 |
| SD1 | 29.75 (17.23) | 31.88 (27.90) | 0.028 | −0.610 |
| SD2 | 65.91 (28.67) | 62.63 (32.84) | 0.507 | −0.184 |
| SampEn | 1.64 (0.30) | 1.64 (0.60) | 0.807 | −0.068 |
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.