Logistic regression results for factors associated with oral appliance treatment success
| Variable | β | se | Wald | OR | p-value |
| Criterion 1 | |||||
| AHI baseline events h–1 | −0.61 | 0.029 | 4.517 | 0.941 | 0.034 |
| Expansion ratio of CSA in the velopharynx | 0.349 | 0.166 | 4.434 | 1.418 | 0.035 |
| Criterion 2 | |||||
| AHI baseline events h–1 | −0.087 | 0.030 | 8.229 | 0.916 | 0.004 |
| Expansion ratio of CSA in the velopharynx | 1.992 | 0.604 | 10.864 | 7.328 | 0.001 |
| Criterion 3 | |||||
| Expansion ratio of CSA in the velopharynx | 1.018 | 0.505 | 4.060 | 2.766 | 0.044 |
Criterion 1: reduction in apnoea–hypopnoea index (AHI) to <5 events h–1 and >50% reduction from baseline; criterion 2: reduction in AHI to <10 events h–1 and >50% reduction from baseline; criterion 3: reduction in AHI >50%. CSA: cross-sectional area.