Table 3. Objective snoring sound parameters at baseline for the entire study cohort (n = 30).
| Overall | Palatal implant group | Radiofrequency group | Difference* | P value | |
| (n = 30) | (n = 15) | (n = 15) | (95% CI) | ||
| Total domain (40 Hz–2000 Hz) | |||||
| SI (events/hour) | 116.3 (22.3) | 116.3 (23.7) | 116.4 (38.4) | −0.1 (−93.2 to 92.9) | 0.135 |
| Imax (dB) | 64.3 (2.3) | 70.9 (3.3) | 57.7 (2.1) | 13.2 (4.9 to 21.4) | 0.004 |
| Imean (dB) | 49.1 (1.2) | 50.8 (1.3) | 47.4 (2.0) | 3.4 (−1.4 to 8.3) | 0.054 |
| Fpeak (Hz) | 580.3 (107.6) | 543.3 (150.8) | 617.3 (158.6) | −74.0 (−521.6 to 373.6) | 0.709 |
| Fmean (Hz) | 101.9 (4.8) | 101.4 (5.8) | 102.3 (7.9) | −0.9 (−21.0 to 19.2) | 0.868 |
| B1 domain (40 Hz–300 Hz) | |||||
| SI (events/hour) | 113.3 (22.3) | 113.4 (23.6) | 113.3 (38.5) | 0.1 (−92.9 to 93.1) | 0.135 |
| Imax (dB) | 58.9 (1.8) | 63.8 (2.5) | 53.9 (2.0) | 9.8 (3.1 to 16.5) | 0.004 |
| Imean (dB) | 46.0 (1.1) | 47.2 (1.1) | 44.8 (1.9) | 2.4 (−2.1 to 7.0) | 0.093 |
| Fpeak (Hz) | 219.0 (8.6) | 217.3 (8.9) | 220.7 (14.9) | −3.3 (−39.0 to 32.3) | 0.934 |
| Fmean (Hz) | 100.0 (4.7) | 98.0 (6.1) | 101.9 (7.4) | −3.9 (−23.7 to 15.8) | 0.494 |
Values were given as mean (standard error). AHI: apnea-hypopnea index. BMI: body mass index. CI: conference interval; PSG-SI: polysomnography-defined snoring index. SOS: snoring outcomes survey. VAS: visual analogue scale.
*Statistical analyses were implemented with the Mann-Whitney U test.