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Variables identified to be related to AHI in Spearman's rho test and their correlation coefficients.
| Variable | Correlation coefficient | Variable | Correlation coefficient |
|---|---|---|---|
| BMI | 0.491 | FVC | −0.149 |
| NC | 0.358 | FEV1% | −0.101 |
| WC | 0.371 | FEV1/FVC | −0.085 |
| HC | 0.112 | PaO2 | −0.203 |
| Smoking | 0.190 | PaCO2 | 0.161 |
| ESS | 0.103 | SpO2 | −0.242 |
| TS | 0.431 |
