Table 1.
Anthropometric data and the respiratory function data of patients according to polysomnographic results
| snorers[A] | mild OSA[B] | OSAS[C] | p Value | p Value | p Value | |
|---|---|---|---|---|---|---|
| (n = 84) | (n = 37) | (n = 93) | [A] vs. [B] | [A] vs. [C] | [B] vs. [C] | |
| Age, years | 44.5 ± 8.4 | 45.6 ± 9.1 | 46.3 ± 10.9 | 1.000 | 0.708 | 1.000 |
| Height, cm | 166.7 ± 8.6 | 165.4 ± 8.3 | 167.2 ± 9.0 | 1.000 | 1.000 | 0.863 |
| Weight, kg | 79.9 ± 10.7 | 83.3 ± 14.1 | 88.4 ± 15.5 | 0.606 | <0.001* | 0.162 |
| BMI, kg/m2 | 28.9 ± 3.3 | 30.4 ± 4.1 | 31.5 ± 4.3 | 0.150 | <0.001* | 0.393 |
| Sex, male/female | 57/27 | 23/14 | 72/21 | 0.160 | 0.160 | 0.160 |
| FVC, L | 3.81 ± 0.68 | 3.62 ± 0.67 | 3.77 ± 0.89 | 0.664 | 1.000 | 1.000 |
| FEV1, L | 3.08 ± 0.59 | 2.94 ± 0.55 | 3.05 ± 0.73 | 0.847 | 1.000 | 1.000 |
| FEV1/FVC, % predicted | 101 ± 6.0 | 103 ± 6.5 | 102 ± 6.2 | 0.394 | 0.858 | 1.000 |
| TLC, L | 5.70 ± 0.92 | 5.50 ± 0.87 | 5.68 ± 1.02 | 0.887 | 1.000 | 0.989 |
| RV, L | 2.02 ± 0.43 | 2.00 ± 0.37 | 2.06 ± 0.42 | 1.000 | 1.000 | 1.000 |
| IC, L | 2.29 ± 0.60 | 2.32 ± 0.61 | 2.51 ± 0.65 | 1.000 | 0.057 | 0.369 |
| ERV, L | 1.38 ± 0.54 | 1.17 ± 0.58 | 1.11 ± 0.54 | 0.171 | 0.004* | 1.000 |
| FRC, L | 3.41 ± 0.67 | 3.17 ± 0.71 | 3.16 ± 0.71 | 0.267 | 0.062 | 1.000 |
| Rrs0 seated, Pa · s · L−1 | 0.44 ± 0.13 | 0.49 ± 0.13 | 0.53 ± 0.16 | 0.234 | <0.001* | 0.340 |
| Rrs0 supine, kPa · s · L−1 | 0.58 ± 0.12 | 0.68 ± 0.11 | 0.76 ± 0.18 | 0.004* | <0.001* | 0.025* |
| Grs seated, L · kPa−1 · s−1 | 2.46 ± 0.66 | 2.19 ± 0.60 | 2.03 ± 0.56 | 0.067 | <0.001* | 0.580 |
| Grs supine, L · kPa−1 · s−1 | 1.78 ± 0.34 | 1.51 ± 0.28 | 1.40 ± 0.33 | <0.001* | <0.001* | 0.195 |
| RDI, events/h | 2.60 ± 1.60 | 9.91 ± 3.78 | 41.75 ± 21.10 | 0.009* | <0.001* | <0.001* |
Abbreviations: BMI body mass index, FVC forced vital capacity, FEV 1 forced expiratory volume in 1 s, FEV 1 /FVC, (% predicted) ratio of FEV1 to FVC, (percentages of predicted values), ERV expiratory reserve volume, FRC functional residual capacity, RV residual volume, TLC total lung capacity, IC inspiratory capacity, Rrs0 resistance at zero-frequency, is derived from linear-regression analysis of resistance vs frequency (over the 5 to 15Hz) and calculated for each subject in every condition according to the linear model (Fig. 2), Grs respiratory conductance at 0 Hz, the reciprocal of Rrs0, RDI respiratory disturbance index. The data are expressed as means ± standard deviation. Comparisons were made between groups using one-way ANOVA. p-values < 0.05 were considered statistically significant
* Exist significant difference [A] Snorers group [B] Mild OSA group [C] OSAS group