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| HRV variables | Risk factors | p-value |
| SDNN (ms) < 100 | MI/IHD | 0.043 |
| SDNN (ms) >100 | Statin therapy | 0.06 |
| Triangular index < 25 | Male gender | 0.032 |
| MI/IHD | 0.033 | |
| Triangular index > 25 | Statin therapy | 0.028 |
MI/IHD: myocardial infarction/ischaemic heart disease, SDNN: standard deviation normal-to-normal interval, SDANN: standard deviation average normal-to-normal interval, RMSSD: mean square root of successive differences.
