Table 2.
Baseline comparison between groups
| Variable/baseline parameters | Baseline comparison (Mann-Whitney U test) | |||
|---|---|---|---|---|
|
| ||||
| Experienced (n=19) | Novice (n=17) | U | P | |
|
|
||||
| Median (Q1-Q3) | ||||
| BPM | 72.2 (69.8-76.7) | 68.2 (63.9-76.3) | 114.0 | 0.132 |
| SDNN (ms) | 45.8 (37.1-73.6) | 58.9 (39.9-68.2) | 149.5 | 0.704 |
| RMSSD (ms) | 41.1 (28.3-63.5) | 44.6 (29.8-54.2) | 157.5 | 0.899 |
| pRR50 (%) | 16.2 (8.5-34.8) | 22.9 (8.6-34.4) | 156.5 | 0.874 |
| Total power (ms²) | 2183 (998-7490) | 3556 (1586-4653) | 144.5 | 0.590 |
| LF power (ms²) | 585.7 (283.5-912.5) | 691.6 (305.6-1213.8) | 147.5 | 0.657 |
| HF power (ms²) | 1294.9 (998.1-1892.8) | 777.5 ( 440.3-1321.5) | 92.5 | 0.029* |
| LF/HF | 0.8 (0.6-1.3) | 0.8 (0.6-0.9) | 148.5 | 0.680 |
*P<0.05 was considered significant. All values are in the median and interquartile range. RR interval: The distance between subsequent R-wave peaks in ECG, BPM: Beats per minute, SDNN: Standard deviation of RR intervals, RMSSD: The square root of the mean of the sum of the squares of differences between adjacent RR intervals, pRR50 (%): Proportion derived by dividing and NN50 by the total number of RR intervals, LF: Low frequency, HF: High frequency, LF/HF: Ratio of low frequency to high frequency, ECG: Electrocardiogram