Table 2.
Characteristics of Patients and Heart Rate Variability Results According to Sleep Apnea Status
| n | age | BMI | μLF | μHF | mean LF:HF | sdLF | sdHF | sd LF:HF | |
|---|---|---|---|---|---|---|---|---|---|
| Severe OSA | 8 | 50.8 | 35.0 | 2610 | 1283 | 2.723 ± 0.966 | 1685 | 853 | 1.463 ± 0.398 |
| Moderate OSA | 5 | 46.6 | 28.9 | 999 | 326 | 5.186 ± 2.722 | 813 | 259 | 3.854 ± 1.353 |
| Normal | 7 | 43.6 | 32.4 | 2121 | 1084 | 2.656 ± 0.648 | 1586 | 632 | 1.730 ± 0.799 |
| CPAP | 5 | 49.2 | 34.6 | 691 | 461 | 3.382 ± 1.614 | 813 | 250 | 2.341 ± 1.002 |
BMI, body mass index; CPAP, continuous positive airway pressure; LF:HF, ratio of low to high frequency power; μLF, mean low frequency power; μHF, mean high frequency power; OSA, obstructive sleep apnea; sdHF, standard deviation of high frequency power; sdLF, standard deviation of low frequency power; sd LF:HF, stand deviation of ratio of low to high frequency power.