Table 3.
Comparison of the HRV parameters among subgroups categorized by serum prealbumin level.
| Prealbumin-Deficient Group (n = 237) |
Normal Group (n = 189) |
p-Value | |
|---|---|---|---|
| Frequency domain | |||
| VLF (ms2) | 585.99 ± 250.44 | 664.85 ± 260.34 | 0.002 * |
| LF(ms2) | 391.12 ± 175.31 | 430.32 ± 161.25 | 0.017 * |
| HF(ms2) | 159.54 ± 79.64 | 186.34 ± 70.81 | 0.003 * |
| LF/HF ratio | 4.98 ± 2.87 | 5.58 ± 2.62 | 0.026 * |
| Time domain | |||
| SDNN (ms) | 93.46 ± 30.39 | 99.85 ± 29.03 | 0.028 * |
| SDANN (ms) | 95.34 ± 32.05 | 99.51 ± 30.91 | 0.174 |
| ASDNN (ms) | 48.01 ± 12.56 | 50.85 ± 11.39 | 0.015 * |
| rMSSD (ms) | 25.85 ± 6.96 | 26.57 ± 6.87 | 0.286 |
| pNN50 (%) | 48.75 ± 25.97 | 48.91 ± 22.75 | 0.946 |
Values are presented as the mean ± standard deviation. * p < 0.05. HRV, heart rate variability; VLF, very low frequency; LF, low frequency; HF, high frequency; SDNN, standard deviation of intervals of all normal beats; SDANN, standard deviation of five-minute mean R-R interval; ASDNN, mean of five-minute standard deviations of intervals; rMSSD, root mean square of the difference of successive R-R intervals; pNN50, percentage of intervals that were more than 50 ms different from the previous interval.