Table 1. Descriptive values for all variables of the study.
| All (n = 156) | Men (n = 75) | Women (n = 81) | |
|---|---|---|---|
| Age (years) | 38.4 ± 15.57 | 39.1 ± 15.60 | 37.8 ± 15.6 |
| Weight (kg) | 72.3 ± 16.7 | 85.2 ± 17.6 | 64.2 ± 10.9 |
| Height (m) | 1.68 ± 0.09 | 1.76 ± 0.06 | 1.62 ± 0.05 |
| Heart rate (bpm) | 66.2 ± 9.97 | 65.1 ± 10.15 | 67.4 ± 9.72 |
| SDNN (ms) | 41.3 ± 21.49 | 42.9 ± 22.96 | 39.87 ± 20.06 |
| RMSSD (ms) | 43.2 ± 27.57 | 43.4 ± 29.42 | 43.13 ± 25.9 |
| PNN50 (%) | 21.3 ± 21.15 | 21.4 ± 21.24 | 21.23 ± 21.21 |
| High frequency (ms2) | 941 ± 1225 | 945 ± 1454 | 937 ± 971 |
| Low frequency (ms2) | 941 ± 1099 | 1076 ± 1259 | 817 ± 919 |
| Low/high frequency ratio | 1.6 ± 1.96 | 1.8 ± 1.63* | 1.5 ± 2.24* |
| SD1 (ms) | 30.6 ± 19.53 | 30.7 ± 20.84 | 30.6 ± 18.4 |
| SD2 (ms) | 49.0 ± 24.56 | 51.3 ± 26.4 | 46.9 ± 22.7 |
| SD2/SD1 ratio | 1.7 ± 0.59 | 1.91 ± 0.67* | 1.7 ± 0.47* |
| Stress score (ms) | 26.3 ± 14.05 | 25.9 ± 15.24 | 26.7 ± 12.91 |
| Sympathetic/parasympathetic ratio | 1.6 ± 2.11 | 1.8 ± 2.65 | 1.5 ± 1.43 |
Notes:
*
P < 0.05 between gender on Mann–Whitney Test.
Data are presented as Mean ± Standard Deviation. Abbreviations: SDNN, standard deviation of RR intervals; RMSSD, square root of the mean squared differences between successive RR intervals; PNN50, percentage of successive RR interval pairs that differ more than 50 ms; SD1, standard deviation of Poincare plot orthogonal to the line-of-identity; SD2, standard deviation of Poincare plot along the line-of-identity; bpm, beats per minute; ms, milliseconds; ms2, milliseconds square; %, percentage.