Table 2.
Correlations between cardiac variables in the clinical group.
| MeanHR | PEP | RMSSD | SampEn | ||
|---|---|---|---|---|---|
| MeanHR | r | 1 | |||
| p | – | ||||
| n | 32 | ||||
| PEP | r | −0.32 | 1 | ||
| p | 0.08 | – | |||
| n | 30 | 30 | |||
| RMSSD | r | −0.61*** | 0.15 | 1 | |
| p | <0.001 | 0.43 | – | ||
| n | 31 | 29 | 31 | ||
| SampEn | r | −0.19 | 0.16 | −0.25 | 1 |
| p | 0.31 | 0.40 | 0.18 | – | |
| n | 31 | 29 | 30 | 31 | |
| DFA-α1 | r | 0.57*** | −0.29 | −0.65*** | 0.19 |
| p | 0.001 | 0.13 | <0.001 | 0.31 | |
| n | 32 | 30 | 31 | 31 |
r, Pearson product-moment correlation coefficient; DFA, detrended fluctuation analysis; RMSSD, root mean square of successive differences; PEP, pre-ejection period; SampEn, sample entropy;
***
p ≤ 0.001.