Table 2. The correlation analysis of apnea-hypopnea index with obstructive sleep apnea risk factors and symptoms.
*Data was analyzed by Pearson’s correlation coefficient test; ** Data was analyzed by Spearman’s correlation coefficient test; BMI: body mass index
| Parameters | Apnea-Hypopnea Index | |
| OSA patients (n=328) | ||
| r | p-value | |
| Lowest saturation(%)* | -0.63 | <0.001 |
| Average saturation(%)* | -0.51 | <0.001 |
| Time SpO2 under 89(%)* | 0.47 | <0.001 |
| Age(years)* | 0.15 | 0.006 |
| Weight(kg)* | 0.37 | <0.001 |
| BMI* | 0.24 | <0.001 |
| Gender | 0.17 | 0.002 |
| Morning headache** | 0.19 | 0.001 |
| Heart failure ** | -0.11 | 0.045 |
| Hypertension** | 0.1 | 0.073 |
| Exercise** | -0.03 | 0.550 |
| Snoring ** | 0.06 | 0.262 |
| Daytime sleepiness** | 0.07 | 0.218 |