Table 5.
Correlation analysis of serum albumin, prealbumin, and transferrin levels with the HRV parameters.
| Albumin | Prealbumin | Transferrin | |
|---|---|---|---|
| Frequency domain | |||
| VLF (ms2) | r = 0.314 | r = 0.313 | r = 0.307 |
| p = 0.003 * | p = 0.004 * | p = 0.009 * | |
| LF (ms2) | r = 0.223 | r = 0.226 | r = 0.219 |
| p = 0.003 * | p = 0.002 * | p = 0.003 * | |
| HF (ms2) | r = 0.218 | r = 0.257 | r = 0.254 |
| p = 0.005 * | p = 0.004 * | p = 0.005 * | |
| LF/HF ratio | r = 0.256 | r = 0.257 | r = 0.254 |
| p = 0.008 * | p = 0.007 * | p = 0.001 * | |
| Time domain | |||
| SDNN (ms) | r = 0.124 | r = 0.127 | r = 0.126 |
| p = 0.011 * | p = 0.009 * | p = 0.009 * | |
| SDANN (ms) | r = 0.099 | r = 0.116 | r = 0.122 |
| p = 0.041 * | p = 0.030 * | p = 0.034 * | |
| ASDNN (ms) | r = 0.116 | r = 0.122 | r = 0.121 |
| p = 0.017 * | p = 0.012 * | p = 0.012 * | |
| rMSSD (ms) | r = 0.122 | r = 0.127 | r = 0.121 |
| p = 0.011 * | p = 0.009 * | p = 0.012 * | |
| pNN50 (%) | r = 0.075 | r = 0.079 | r = 0.076 |
| p = 0.122 | p = 0.104 | p = 0.118 |
* 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.