Table 3.
Comparison of HRV parameters between groups
| VitD‐deficient group (n = 52) | Control group (n = 50) | Total (n = 102) | p‐value | |
|---|---|---|---|---|
| Mean heart rate (bpm) | ||||
| Before replacement | 77.4 ± 6.6 | 79.04 ± 5.9 | 78.2 ± 6.3 | .202 |
| After replacement | 78.08 ± 6.1 | 79.04 ± 5.9 | 78.5 ± 6.03 | .415 |
| p‐value for intragroup | .168 | 1 | – | |
| SDNN (ms) | ||||
| Before replacement | 68.58 ± 13.53 | 121.02 ± 27.45 | 94.28 ± 33.94 | .001 |
| After replacement | 119.87 ± 28.28 | 121.02 ± 27.45 | 120.43 ± 27.75 | .832 |
| p‐value for intragroup | <.001 | 1 | – | |
| SDANN (ms) | ||||
| Before replacement | 95.96 ± 22.26 | 166.48 ± 32.97 | 130.53 ± 45.08 | .001 |
| After replacement | 164.44 ± 33.90 | 166.48 ± 32.97 | 165.44 ± 33.30 | .745 |
| p‐value for intragroup | <.001 | 1 | – | |
| RMSSD (ms) | ||||
| Before replacement | 23 (12/39) | 59 (47/92) | 38.5 (12/92) | <.001 |
| After replacement | 58 (46/92) | 59 (47/92) | 58.5 (46/92) | .638 |
| p‐value for intragroup | <.001 | 1 | – | |
| PNN50 (%) | ||||
| Before replacement | 6.5 (2/15) | 36 (20/55) | 14.5 (2/55) | <.001 |
| After replacement | 33 (17/52) | 36 (20/55) | 35.5 (17/55) | .556 |
| p‐value for intragroup | <.001 | 1 | – | |
| HF (nu) | ||||
| Before replacement | 19.6 ± 10.2 | 42.1 ± 14.3 | 33.4 ± 23.2 | <.001 |
| After replacement | 39.4 ± 11.7 | 42.1 ± 14.3 | 40.8 ± 13.7 | .642 |
| p‐value for intragroup | <.001 | 1 | – | |
| LF (nu) | ||||
| Before replacement | 62.9 ± 15.6 | 61.6 ± 21.7 | 62.5 ± 24.4 | .795 |
| After replacement | 59.4 ± 13.8 | 61.6 ± 21.7 | 59.8 ± 18.8 | .811 |
| p‐value for intragroup | .762 | 1 | ‐ | |
Abbreviations: SDNN, standard deviations of all NN intervals; SDANN, standard deviation of the averages of NN intervals in all 5‐min segments of the entire recording; RMSSD, the square root of the mean of the sum of the squares of differences between adjacent NN intervals; PNN50, the number of pairs of adjacent NN intervals differing by more than 50 ms divided by the total number of all NN intervals; HF, high‐frequency component; LF, low‐frequency component.