Table 3.
Correlations between OSA severity index and oxygen saturation parameters, PSG parameters, and patient characteristics
| Variables | Correlation# | AHI* | Variables | Correlation | AHI |
|---|---|---|---|---|---|
| Spearman’s Rank Correlation (rho) <0.05 | |||||
| Desaturation Index | Correlation Coefficient | 0.753** | Duration | Correlation Coefficient | -0.259** |
| Sig. (2-tailed) | >0.001 | of~REM | Sig. (2-tailed) | 0.003 | |
| Oxygen Saturation Nadir | Correlation Coefficient | -0.466** | Total Arousal | Correlation Coefficient | 0.530** |
| Sig. (2-tailed) | >0.001 | Index | Sig. (2-tailed) | >0.001 | |
| Sum of all Desaturations | Correlation Coefficient | 0.574** | Respiratory | Correlation Coefficient | 0.684** |
| Sig. (2-tailed) | >0.001 | Arousal Index | Sig. (2-tailed) | >0.001 | |
| Desaturations<90 | Correlation Coefficient | 0.385** | Age | Correlation Coefficient | 0.323** |
| Sig. (2-tailed) | >0.001 | Sig. (2-tailed) | >0.001 | ||
| Average Apnea/Hypopnea Duration | Correlation Coefficient | 0.295** | BMI | Correlation Coefficient | 0.227** |
| Sig. (2-tailed) | <0.001 | Sig. (2-tailed) | 0.010 |
n=129; #Spearman’s rank correlation (rho); *AHI=Apnea-hypopnea index categorized as mild, moderate, or severe; ~REM=Rapid eye movements; **Highly significant correlation coefficient; BMI: Body mass index