Table 1.
Demographic and polysomnographic data of the study patients
| Total | RD group | ND group | p value | |
|---|---|---|---|---|
| N | 42 | 18 | 24 | |
| Male/female | 29 / 13 | 10 / 8 | 19 / 5 | NS |
| Age (years) | 51.4 ± 12.9 | 52.9 ± 11.8 | 50.2 ± 13.7 | NS |
| BMI (kg/m2) | 30.4 ± 6.4 | 31.2 ± 7.3 | 29.7 ± 5.7 | NS |
| ESS | 11.2 ± 4.3 | 11.4 ± 4.8 | 11.2 ± 3.9 | NS |
| Neck circumference (cm) | 40.6 ± 4.5 | 40.2 ± 4.1 | 40.9 ± 4.8 | NS |
| Mallampati score: I | 0 | 0 | 0 | NS |
| II | 14 | 4 | 10 | |
| III | 12 | 7 | 5 | |
| IV | 14 | 7 | 7 | |
| Previous ENT surgery | 9 (21.4%) | 3 (16.7%) | 6 (25.0%) | NS |
| Nasal congestion | 15 (35.7%) | 6 (33.3%) | 9 (37.5%) | NS |
| AHI (/hours) | 26.2 ± 18.8 | 22.3 ± 11.7 | 29.1 ± 22.6 | NS |
| Min O2 (%) | 84.5 ± 8.8 | 82.4 ± 10.5 | 86.0 ± 7.0 | NS |
| Total sleep time (min) | 367.6 ± 64.2 | 353.2 ± 57.2 | 378.4 ± 68.1 | NS |
| Time of stage N1 (%) | 10.8 ± 8.6 | 11.8 ± 9.6 | 9.7 ± 7.8 | NS |
| Time of stage N2 (%) | 70.7 ± 9.2 | 71.7 ± 9.3 | 70.0 ± 9.1 | NS |
| Time of stage N3 (%) | 2.2 ± 4.4 | 1.2 ± 3.0 | 3.0 ± 5.2 | NS |
| Time of stage REM (%) | 16.3 ± 5.5 | 15.3 ± 5.3 | 17.1 ± 5.7 | NS |
NS, no significance (p > 0.05)