Table 4.
Airway parameters without and with an MAD.
| Without MAD (n = 71) | With MAD (n = 71) | P | |
|---|---|---|---|
| Total UA volumea (cm3) | 8.6 (5.4–12.8) | 10.7 (6.4–15.4) | .003 |
| Velopharynx volumea (cm3) | 2.1 (0.5–4.1) | 3.3 (1.8–6.0) | < .0001 |
| Oropharynx volumea (cm3)a | 3.3 (2.0–4.5) | 3.2 (1.7–4.7) | .492 |
| Hypopharynx volumea (cm3) | 3.0 (1.8–5.3) | 3.1 (1.7–5.5) | .547 |
| UA resistancea,* (Pa/L) | 0.11 (0.06–0.23) | 0.10 (0.05–0.21) | .595 |
| UA resistance based radiusa (mm) | 2.1 (0.0–2.7) | 2.4 (1.5–2.9) | .164 |
| Minimal cross-sectional areaa (cm2) | 0.23 (0.0–0.58) | 0.32 (0.05–0.66) | .140 |
| Airway lengthb (cm) | 7.0 ± 0.8 | 6.9 ± 0.8 | .250 |
| Distance spina mentalis–hyoida (mm) | 36.2 (32.0–40.6) | 36.1 (31.2–41.3) | .571 |
aMedian (Q1–Q3) and Wilcoxon signed-rank test. bMean ± SD and paired t test. *Analysis on 44/71 patients. MAD = mandibular advancement device, Q = quartile, SD = standard deviation, UA = upper airway.