Table 3.
Electrocardiographic findings of the study population
| Control < 5 (Group 1) | AHI 5–14 (Group 2) | AHI 15–29 (Group 3) | AHI ≥ 30 (Group 4) | p Value | |
|---|---|---|---|---|---|
| Heart rate (beats/min) | 73 ± 8 | 76 ± 10 | 75 ± 9 | 72 ± 12 | .680 |
| QT (ms) | 386 ± 24 | 388 ± 32 | 397 ± 26 | 406 ± 28 | <.001 |
| QTc | 426 ± 21 | 437 ± 28 | 444 ± 23 | 445 ± 26 | <.001 |
| QTd | 37.4 ± 5.5 | 38.1 ± 5.5 | 43.6 ± 5.8 | 48.5 ± 7.7 | <.001 |
| Tp‐Te (ms) | 68.3 ± 6.8 | 71.8 ± 6.3 | 79.1 ± 5.5 | 85.1 ± 6.4 | <.001 |
| Tp‐Te/QT | 167.5 ± 12.7 | 181.7 ± 13.0 | 202.2 ± 10.0 | 219.4 ± 13.5 | <.001 |
| Tp‐Te/QTc | 151.1 ± 16.6 | 167.6 ± 16.6 | 193.7 ± 14.4 | 225.5 ± 17.0 | <.001 |
Expressed as mean ± SD.
Abbreviations: AHI, apnea–hypopnea index; QTc, corrected QT interval; QTd, QT interval dispersio; Tp‐Te, T peak and T end interval.