Table 2.
Correlations Between Linear and Non-linear Parameters of Heart Rate Variability and Clinical Variables.
| Correlation coefficient r ( P value) a | NIHSS score | ICH volume | ICH score |
|---|---|---|---|
| Complexity index | −0.26 (0.01) | −0.35 (0.0006) | −0.26 (0.01) |
| Basal ganglia | −0.26 (0.11) | −0.20 (0.24) | −0.37 (0.02) |
| Thalamus | −0.37 (0.03) | −0.34 (0.05) | −0.27 (0.12) |
| Lobar | −0.29 (0.28) | −0.68 (0.004) | −0.59 (0.02) |
| SDNN | −0.08 (0.43) | −0.09 (0.40) | −0.03 (0.78) |
| RMSSD | −0.13 (0.22) | −0.01 (0.95) | −0.03 (0.78) |
| High frequency | −0.13 (0.22) | −0.04 (0.71) | −0.03 (0.77) |
| Low frequency | −0.19 (0.07) | −0.08 (0.45) | −0.03 (0.73) |
| LF-HF ratio | −0.01 (0.93) | −0.03 (0.77) | −0.02 (0.86) |
ICH, intracerebral hemorrhage; LF-HF, low-frequency to high-frequency; NIHSS, National Institutes of Health Stroke Scale; RMSSD, root-mean-square of successive beat-to-beat differences; SDNN, standard deviation of normal to normal R wave.
aPartial correlation was adjusted for age and sex.
Numbers in bold indicated significant findings.