Table 1.
Morphologic and functional variable of the upper airway and correlation coefficient to AHI (n = 27).
| Min | Max | Mean | SD | AHI Correlation Coefficients | P | |
|---|---|---|---|---|---|---|
| Age (years) | 3.70 | 13.10 | 6.62 | 2.26 | — | — |
| Height (cm) | 91.90 | 153.40 | 116.88 | 16.35 | — | — |
| Body weight (Kg) | 12.10 | 54.00 | 24.01 | 10.74 | — | — |
| BMI (kg/mm2) | 12.60 | 23.10 | 16.80 | 2.95 | — | — |
| Percentiles BMI (%ile) | 0.10 | 98.20 | 54.23 | 34.83 | — | — |
| AHI (events/h) | 1.10 | 36.30 | 7.38 | 7.00 | — | — |
| Max pressure (Pa)† | −576.00 | −50.00 | −159.30 | 114.87 | −.838** | .000 |
| ΔNA (Pa)† | −310.00 | 2.00 | −43.49 | 81.39 | −.220 | .271 |
| ΔRA (Pa)† | −210.00 | 1.00 | −30.24 | 44.59 | −.301 | .127 |
| ΔOA (Pa)† | −170.90 | −0.70 | −51.87 | 51.90 | −.838** | .000 |
| Adenoid grade (degree)† | 1.00 | 5.00 | 3.41 | 0.93 | .427* | .026 |
| Tonsil grade (degree)† | 1.00 | 5.00 | 4.07 | 0.96 | .399* | .039 |
| NAv (cm3)†† | 0.40 | 4.50 | 1.54 | 1.05 | −.148 | .461 |
| RAv (cm3)†† | 0.70 | 4.50 | 2.05 | 0.88 | −.106 | .600 |
| OAv (cm3)†† | 0.30 | 6.70 | 2.15 | 1.39 | −.131 | .514 |
| PAv (cm3)†† | 1.70 | 10.40 | 4.21 | 1.78 | −.082 | .685 |
| CSANA (mm2)†† | 16.30 | 327.90 | 106.24 | 76.40 | −.384* | .048 |
| CSARA (mm2)†† | 19.80 | 178.90 | 74.62 | 43.31 | −.442* | .021 |
| CSAOA (mm2)†† | 15.80 | 208.00 | 61.45 | 45.03 | .054 | .788 |
| CSAmin (mm2)†† | 15.80 | 178.90 | 44.14 | 33.79 | −.485* | .010 |
†Spearman correlation coefficient; ††Pearson correlation coefficient; *P < .05; **P < .01. AHI = apnea-hypopnea index, BMI = body-mass index, CSA = cross-sectional area, CSAmin = minimum CSA, CSANA = CSA of NA, CSAOA = CSA of OA, CSARA = CSA of RA, NA = nasopharyngeal airway, ΔNA = pressure changes in NA corresponding to adenoids part, NAv = NA volume, OA = oropharyngeal airway, OAv = OA volume, ΔOA = pressure changes in OA corresponding to tonsil part, PAv = pharyngeal airway volume, RA = retropalatal airway, ΔRA = pressure changes in RA where adenoids and palatine tonsil influence, RAv = RA volume, SD = standard deviation.