Table 1. Patient characteristics for the entire study cohort (n = 30).
| Overall | Palatal implant group | Radiofrequency group | Difference* | P value | |
| (n = 30) | (n = 15) | (n = 15) | (95% CI) | ||
| Gender (% male [n]) | 90 (27) | 100 (15) | 80 (12) | 20% (4% to 45%) | 0.073 |
| Age (years) | 36.7 (1.7) | 38.3 (3.1) | 35.1 (1.9) | 3.3 (−3.2 to 9.7) | 0.288 |
| BMI (kg/m2) | 24.2 (0.5) | 24.7 (0.8) | 23.6 (0.7) | 1.1 (−1.0 to 3.2) | 0.983 |
| Neck circumference (cm) | 37.9 (0.6) | 39.0 (0.9) | 37.0 (0.9) | 2.0 (−0.6 to 4.6) | 0.391 |
| Tonsil size | 1.0 (0.03) | 1.1 (0) | 1.0 (0) | 0.1 (−0.1 to 0.2) | 0.317 |
| Friedman's tongue position | 2.4 (0.09) | 2.3 (0.1) | 2.4 (0.1) | −0.1 (−0.4 to 0.3) | 0.710 |
| AHI (events/hour) | 7.8 (0.7) | 7.9 (0.7) | 7.7 (1.1) | 0.2 (−2.6 to 3.1) | 0.419 |
| PSG-SI (events/hour) | 290.2 (38.4) | 307.1 (48.0) | 273.3 (55.2) | 33.8 (−126.0 to 193.6) | 0.633 |
| VAS | 7.3 (0.4) | 7.9 (0.5) | 6.8 (0.6) | 1.1 (−0.3 to 2.5) | 0.384 |
| SOS | 40.5 (1.6) | 40.4 (2.6) | 40.5 (2.5) | −0.1 (−6.9 to 6.7) | 0.934 |
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.