Table 2.
Adjusted comparison of upper airway caliber between Icelandic and Chinese patients matched for age, gender, and ODI
| Domain | Variable | Model 1: age, ODI, height Adjusted mean (95% CI) | p | Model 2: age, ODI, BMI Adjusted mean (95% CI) | p | ||
|---|---|---|---|---|---|---|---|
| Icelandic | Chinese | Icelandic | Chinese | ||||
| Total Airway * | Length (mm) | 72.83 (71.64, 74.02) | 71.48 (69.76, 73.19) | 0.2306 | 74.56 (72.97, 76.16) | 67.99 (65.90, 70.08) | <0.0001 |
| Volume (mm3) | 13384 (12526, 14242) | 11315 (10082, 12549) | 0.0075 | 14177 (13238, 15116) | 9655 (8374, 10937) | <0.0001 | |
| Cross-sectional area (mm2) | 182.3 (171.1, 193.4) | 157.1 (141.1, 173.1) | 0.0120 | 189.4 (177.9, 200.8) | 142.5 (126.5, 158.5) | <0.0001 | |
| RP airway † | Volume (mm3) | 5057 (4667, 5447) | 3391 (2843, 3939) | <0.0001 | 5337 (4925, 5749) | 2839 (2277, 3401) | <0.0001 |
| Min. cross-sectional area (mm2) | 64.49 (58.36, 70.61) | 46.32 (37.55, 55.10) | 0.0018 | 67.39 (61.29, 73.49) | 40.87 (32.14, 49.60) | <0.0001 | |
| Mean cross-sectional area (mm2) | 141.3 (132.0, 150.6) | 90.61 (77.23, 104.0) | <0.0001 | 147.4 (137.9, 157.0) | 78.59 (65.07, 92.10) | <0.0001 | |
| Min. AP distance (mm) | 6.77 (6.38, 7.17) | 5.54 (4.99, 6.08) | 0.0004 | 6.72 (6.32, 7.11) | 5.64 (5.10, 6.18) | 0.0017 | |
| Min. lateral distance (mm) | 13.76 (12.77, 14.75) | 8.86 (7.49, 10.22) | <0.0001 | 14.35 (13.39, 15.32) | 7.77 (6.45, 9.08) | <0.0001 | |
| RG Airway † | Volume (mm3) | 8314 (7698, 8930) | 7917 (7009, 8825) | 0.4934 | 8834 (8168, 9500) | 6803 (5864, 7742) | 0.0004 |
| Min. cross-sectional area (mm2) | 136.3 (123.3, 149.2) | 136.2 (117.9, 154.5) | 0.9962 | 140.4 (127.4, 153.5) | 128.4 (110.1, 146.6) | 0.3083 | |
| Mean cross-sectional area (mm2) | 219.5 (202.8, 236.3) | 237.1 (212.7, 261.4) | 0.2521 | 226.8 (209.7, 244.0) | 221.9 (197.5, 246.3) | 0.7441 | |
| Min. AP distance (mm) | 11.59 (10.77, 12.40) | 10.27 (9.14, 11.40) | 0.0722 | 11.47 (10.66, 12.27) | 10.48 (9.37, 11.59) | 0.1679 | |
| Min. lateral distance (mm) | 18.23 (16.83, 19.63) | 18.37 (16.41, 20.32) | 0.9154 | 18.43 (17.04, 19.82) | 17.99 (16.07, 19.92) | 0.7268 |
Significant p-values are given in bold.
AP, anteroposterior, BMI, body mass index, CI, confidence interval, ODI, oxygen desaturation index, RG, retroglossal, RP, retropalatal.
*Bonferroni corrected significance level: p < 0.0167 (equals 0.05/3).
†Bonferroni corrected significance level: p < 0.01 (equals 0.05/5).