Table 4.
Univariate and multivariate risk analysis
| Index | Univariate | Multivariate | ||
|---|---|---|---|---|
|
|
|
|||
| OR [95% CI] | P value | OR [95% CI] | P value | |
| Age | ||||
| 0-39 | Reference | |||
| 40-59 | 0.58 [0.5989-0.973] | 0.3306 | ||
| ≥60 | 1.11 [0.963-1.1532] | 0.3355 | ||
| Sex | ||||
| Female | Reference | |||
| Male | 0.46 [0.133-1.636] | 0.234 | ||
| BMI | ||||
| 18.5-23.9 | Reference | Reference | ||
| 24-27.9 | 1.82 [0.9206-1.982] | 0.047 | 1.24 [0.85-1.85] | 0.28 |
| ≥28 | 1.42 [0.9378-1.515] | 0.1297 | 2.97 [1.75-2.05] | 0.005 |
| AHI | ||||
| 5-14.9 | Reference | |||
| 15-29.9 | 1.23 [0.9378-1.515] | 0.079 | ||
| ≥30 | 1.42 [0.639-1.928] | 0.094 | ||
| REM-AHI | ||||
| 0-14.9 | Reference | Reference | ||
| 15-29.9 | 1.25 [1.1615-1.189] | 0.028 | 1.754 [1.241-2.479] | 0.001 |
| ≥30 | 1.36 [0.414-0.892] | 0.0086 | 2.36 [1.29-4.30] | 0.005 |
| NREM-AHI | ||||
| 0-14.9 | Reference | |||
| 15-29.9 | 1.57 [0.6388-0.6522] | 0.003 | ||
| ≥30 | 1.85 [0.6390-0.6522] | 0.002 | ||
| LSaO2 | ||||
| 20-49 | Reference | |||
| 50-69 | 1.84 [0.69-1.014] | 0.98 | ||
| ≥70 | 1.40 [0.678-1.012] | 0.89 | ||
| Neck circumference | ||||
| 30-39.9 | Reference | |||
| ≥40 | 1.08 [0.77-1.38] | 0.16 | ||
| Waist circumference | ||||
| 75-89 | Reference | Reference | ||
| 90-109.9 | 1.69 [1.04-1.81] | 0.11 | 1.24 [0.64-1.74] | 0.77 |
| ≥110 | 1.19 [1.47-1.88] | 0.42 | 1.19 [0.61-1.94] | 0.87 |
| MSpO2 | ||||
| 70-84 | Reference | |||
| 85-100 | 1.79 [0.639-0.652] | 0.132 | ||
| REM-MSpO2 | ||||
| 60-79 | Reference | Reference | ||
| 80-100 | 1.72 [0.907-1.013] | 0.98 | 1.15 [1.014-1.09] | 0.04 |
| NREM-MSpO2 | ||||
| 70-84 | Reference | |||
| 85-100 | 1.32 [0.638-0.652] | 0.99 | ||
| T90% | ||||
| 0-29.9 | Reference | Reference | ||
| 30-59.9 | 1.25 [1.822-1.96] | 0.49 | 1.38 [0.92-1.79] | 0.18 |
| ≥60 | 3.45 [0.237-0.656] | 0.96 | 1.59 [1.12-2.26] | 0.02 |
| REM-T90% | ||||
| 0-29.9 | Reference | |||
| 30-59.9 | 1.44 [0.486-0.914] | 0.626 | ||
| ≥60 | 1.318 [0.906-1.014] | 0.986 | ||
| NREM-T90% | ||||
| 0-29.9 | Reference | |||
| 30-59.9 | 1.43 [0.256-1.691] | 0.79 | ||
| ≥60 | 1.45 [0.638-0.652] | 0.99 | ||
Note: AHI: apnea hypopnea index; REM-AHI: apnea hypopnea index during REM sleep; NREM-AHI : apnea hypopnea index during non REM sleep; BMI: body mass index; ESS: Epworth Sleepiness Scale; MAI: Micro arousal index; TST: total sleep time; MSpO2: mean pulse oxygen saturation; REM-MSpO2: mean pulse oxygen saturation in REM sleep; NREM-MSpO2: mean pulse oxygen saturation in non REM sleep; LSaO2: lowest arterial oxygen saturation; T90%: percentage of total sleep time when arterial oxygen saturation is lower than 90%; REM-T90%: percentage of total sleep time when arterial oxygen saturation is lower than 90%; NREM-T90%: percentage of total sleep time when arterial oxygen saturation was less than 90% during non REM sleep.