Diagnostic performance of the correlation dimension (D2) for respiratory movement to detect obstructive sleep apnoea/hypopnoea syndrome (OSAHS)
| D2 for respiratory movement | AHI >5·h−1# | |
| Sensitivity % | Specificity % | |
| ≥2.2 | 57.1 | 92.3 |
| ≥2.1 | 78.6 | 84.6 |
| ≥2.0 | 85.7 | 76.9 |
| ≥1.9 | 92.9 | 62.9 |
| ≥1.8 | 92.9 | 53.8 |
| ≥1.7 | 100.0 | 46.2 |
AHI: apnoea-plus-hypopnoea index
#: n=14