Table 2.
Clinical and polysomnography (PSG) parameters of 28 patients who showed an AHI > 10/h at first assessment, measured during the acute stage, and 1 and 6 months later
| First PSG | Second PSG | Third PSG | |
|---|---|---|---|
| N = 28 | N = 28 | N = 28 | |
| BMI | 28.5 ± 4.9 | 28.1 ± 4.6 | 27.9 ± 4.6 |
| TIB (min) | 366 ± 41.8 | 393.3 ± 60.1 | 383.2. ± 77.2 |
| TST (min) | 233.2 ± 42.5 | 301.8 ± 24.5* | 341.3 ± 23.7† |
| Arousal index | 26.9 ± 10.9 | 12.9 ± 3.8* | 4.3 ± 3.5† |
| Sleep efficiency (%) | 62.3 ± 9.6 | 75.9 ± 7.9* | 83.8 ± 5.6† |
| AHI (total) | 19.7 ± 6.9 | 13.9 ± 5.9* | 7.5 ± 4.6† |
| REM AHI | 21.9 ± 11.7 | 14.2 ± 6.7* | 8.1 ± 5.3† |
| CAHI | 0.9 ± 0.7 | 0.7 ± 0.4 | 0.7 ± 0.3 |
| OAHI | 18.8 ± 6.6 | 13.3 ± 5.9* | 6.9 ± 4.7† |
| ODI (≥ 3%) | 24.2 ± 12.9 | 13.3 ± 6.0* | 8.3 ± 4.0† |
| Mean SaO2 | 93.5 ± 1.1 | 95.1 ± 1.1* | 95.4 ± 0.8† |
| Min SaO2 | 84.5 ± 3.7 | 88.3 ± 3.2* | 89.7 ± 1.9† |
| Time lying supine (% TST) | 47.7 ± 7 | 46.9 ± 4.9 | 45.7 ± 6.2 |
| AHI supine | 23 ± 7.4 | 16.8 ± 6.8* | 8.8 ± 5.1† |
| AHI non-supine | 17 ± 6.8 | 11.5 ± 5.2* | 6.4 ± 4.3† |
| WASO (min) | 130.1 ± 28.2 | 77.1 ± 17.7* | 16.9 ± 6.1† |
| SWS (%) | 5.5 ± 2.1 | 10.7 ± 2.1* | 13.7 ± 3.2† |
| REM (%) | 2.4 ± 2.9 | 11 ± 1.3* | 13.6 ± 3.7† |
Data are presented as mean ± SD.
TIB, time in bed; TST, total sleep time; WASO, wake duration after sleep onset; REM(%), rapid eye movement percentage (%) of TST; SWS (%), slow wave sleep percentage (%) of TST; AHI, apnea hypopnea index; CAHI, central apnea-hypopnea index; OAHI, obstructive apnea-hypopnea index; ODI, oxygen desaturation index; SaO2, oxygen saturation.
*
p < 0.05 between second and first PSG,
†
p < 0.05 between third and first PSG.