Table 3.
Effect of radiofrequency ablation of the inferior turbinates on therapeutic CPAP pressures measured in centimetres of water pressure (cwp) and CPAP compliance
| Patient number | Pre-nasal surgery BMI | Post-nasal surgery BMI | Pre-nasal surgery CPAP pressure | Post-nasal surgery CPAP pressure | Duration between surgery and follow-up data (months) | Effect of nasal surgery on pressures (centimetres of water pressure) or use |
|---|---|---|---|---|---|---|
| 1 | 32.92 | 32.78 | N/A | N/A | 2 | Improved CPAP compliance |
| 2 | – | – | N/A | N/A | 2 | Improved CPAP compliance |
| 3 | 31.25 | 31.14 | 13 | 11.1 | 19–22 | Pressure decreased by 1.9 cwp |
| 4 | 33.66 | 35.96 | 13.8 | 14.1 | 8–11 | Pressure increased by 0.3 cwp |
| 5 | 20.38 | 21.12 | 13.8 | 12.4 | 6–7 | Pressure decreased by 1.4 cwp |
| 6 | 24.41 | 24.42 | 10.5 | 6.5 | 19–20 | Pressure decreased by 4 cwp |
| 7 | 26.93 | 27.03 | 6.7 | 6 | 2 | Pressure decreased by 0.6 cwp |
| 8 | 27.18 | 25.86 | 10.6 | 10.3 | 19 | Pressure decreased by 0.3 cwp |
| Total | *Mean difference 1.33 ± 1.52 cwp |
95th percentile therapeutic CPAP pressures are reported, which decreased for patients #3–8, except patient #4 whose BMI increased by 2.3 kg/m2 during the follow-up period
* Standard error of the mean is 0.62, confidence interval is −0.26 to 2.93, p value is 0.085