TABLE 2.
HRV Metrics
| Schizophrenia (n = 37) | Depression (n = 43) | Controls (n = 64) | P* | |
|---|---|---|---|---|
| IBI, ms | 678 (105) | 723 (126) | 776 (142) | 0.001 |
| HR, bpm | 91 (13) | 86 (15) | 80 (16) | 0.004 |
| SDNN, ms | 26 (18) | 38 (17) | 47 (18) | <0.000 |
| cvSDNN | 3.7 (2.2) | 5.1 (1.8) | 5.9 (1.7) | <0.000 |
| RMSSD, ms | 21 (16) | 28 (17) | 39 (19) | <0.000 |
| logLF | 2.3 (0.8) | 2.9 (0.4) | 3.0 (0.4) | <0.000 |
| logHF | 1.9 (0.8) | 2.3 (0.5) | 2.6 (0.6) | <0.000 |
| LF/HF | 3.8 (2.8) | 4.0 (2.3) | 3.1 (1.9) | 0.165 |
| Artifacts corrected (% of beats removed) | 3.3 (7.3) | 1.1 (1.6) | 1.6 (2.6) | 0.054 |
All values presented as “mean (standard deviation)”.
*One-way ANOVA.
bpm indicates beats per minute; cv, coefficient of variance; HR, heart rate.