Table 4.
Correlation between polysomnographic and cephalometric variables
| Parameter | Correlation with AHI | P-valuea | Correlation with LSAT | P-valuea |
|---|---|---|---|---|
| Cephalometric variables | ||||
| SNA | - 0.62 | 0.01 | 0.18 | 0.53 |
| SNB | - 0.48 | 0.07 | 0.13 | 0.27 |
| ANB | - 0.27 | 0.33 | 0.33 | 0.22 |
| PAS | - 0.09 | 0.74 | 0.38 | 0.16 |
| MP-H | - 0.38 | 0.16 | 0.03 | 0.89 |
| Maxillary and mandibular advancement | ||||
| Co-A | - 0.24 | 0.39 | - 0.57 | 0.03 |
| Co-B | - 0.09 | 0.74 | - 0.61 | 0.02 |
aP < 0.05 was considered statistically significant for all analyses. Wilcoxon signed rank test was used to determine the correlation between the PSG variables and the cephalometric variables for each of the outcome measures.
AHI = Apnea/hypopnea index; LSAT = lowest oxygen saturation; SNA = angle between sella, nasion and subspinale point A; SNB = angle between sella, nasion and supramentale point B; ANB = angle between the maxilla and the mandible; PAS = narrowest distance between the base of the tongue and the posterior pharyngeal wall; MP-H = distance from the mandibular plane to the most anterior point of the hyoid bone; Co-A = amount of maxillary advancement; Co-Pog = amount of mandibular advancement.