Table 4.
Structure Matrix Displaying the Correlation of Each Predictor With the Discriminant Function
| Predictors of Hypertension | Discriminant Loadings |
|---|---|
| Age | 0.692 |
| CCI | 0.667 |
| BMI | 0.446 |
| Daytime SaO2 | −0.426 |
| Minimum SaO2 | −0.386 |
| REM mean SaO2 | −0.350 |
| Mean SaO2 | −0.326 |
| DI | 0.284 |
| Hyponeas/h | 0.275 |
| AHI | 0.243 |
| ESS | 0.241 |
| Wilk's lambda=0.771, χ2=289.070, P<.0001 |
Abbreviations: AHI, apnea‐hypopnea index; BMI, body mass index; CCI, Charlson Comorbidity Index; daytime SaO2, daytime mean oxygen saturation; DI, desaturation index; ESS, Epworth Sleepiness Scale; hypopneas/h, number of hypopneas per hour of total sleep time; mean SaO2, mean oxygen saturation during respiratory events; minimum SaO2, minimum oxygen saturation during sleep; REM mean SaO2, mean saturation during rapid eye movement sleep.