Table 4.
Outcomes of questionnaires and weight loss
| Group A (n = 272) | Group B (n = 132) | p value* | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Total | CPAP use | No CPAP use | p-value** | Total | CPAP use | No CPAP use | p-value** | ||
| Before surgery (n, %) | |||||||||
| ESS score | 7.6 ± 5.2 | 7.6 ± 5.1 | 7.3 ± 6.1 | 0.723 | 8.4 ± 5.3 | 8.4 ± 5.3 | NA | NA | 0.483 |
| FOSQ score | 20 (19-20) | 20 (19-20) | 20 (19-20) | 0.476 | 19.7 18.3–20) | 19.7 (18.2–20) | NA | NA | 0.013 |
| Weight | 128.7 ± 23.0 | 128.2 ± 22.1 | 136.5 ± 30.5 | 0.009 | 128.8 ± 23.9 | 128.5 ± 23.5 | NA | NA | 0.912 |
| BMI | 43.8 ± 5.8 | 43.6 ± 5.6 | 45.1 ± 7.5 | 0.006 | 41.2 ± 6.6 | 42.3 ± 6.3 | NA | NA | 0.337 |
| 1 month postoperative (n, %) | |||||||||
| ESS score | 5.9 ± 4.9 | 6.5 ± 5.4 | 5.0 ± 3.5 | 0.029 | 6.7 ± 4.6 | 6.7 ± 4.5 | 6.7 ± 5.4 | 0.532 | 0.778 |
| FOSQ score | 20 (19.3–20) | 20 (19.5–20) | 20 (19.3–20) | 0.788 | 20 (18.7–20) | 20 (18.7–20) | 20 (17.4–20) | 0.827 | 0.012 |
| Weight | 116.8 ± 21.9 | 117.4 ± 19.8 | 116.45 ± 23.9 | 0.067 | 116.6 ± 21.9 | 117.6 ± 21.9 | 104.6 ± 18.3 | 0.573 | 0.889 |
| BMI | 39.5 ± 5.9 | 39.8 ± 5.7 | 38.9 ± 6.1 | 0.682 | 37.9 ± 6.3 | 38.2 ± 6.3 | 33.7 ± 4.2 | 0.442 | 0.513 |
| %TWL | 9.8 ± 5.6 | 23.3 ± 15.6 | 26.5 ± 11.4 | 0.831 | 10.2 ± 3.6 | 10.1 ± 3.2 | 12.5 ± 6.0 | 0.015 | 0.263 |
| %EWL | 24.3 ± 14.4 | 20.2 ± 9.5 | 23.5 ± 10.6 | 0.903 | 27.4 ± 12.2 | 26.5 ± 10.7 | 37.8 ± 19.0 | 0.085 | 0.418 |
| 3 months postoperative (n, %) | |||||||||
| ESS score | 4.7 ± 4.7 | 4.7 ± 4.9 | 4.7 ± 4.5 | 0.686 | 6.4 ± 5.0 | 6.0 ± 4.5 | 8.4 ± 6.5 | 0.066 | 0.402 |
| FOSQ score | 20 (20-20) | 20 (20-20) | 20 (19.7–20) | 0.172 | 20 (19-20) | 20 (19.4–20) | 20 (18.7–20) | 0.334 | 0.009 |
| Weight | 105.6 ± 19.7 | 105.7 ± 18.1 | 105.5 ± 23.2 | 0.245 | 105.1 ± 20.7 | 106.7 ± 20.9 | 97.0 ± 17.9 | 0.557 | 0.816 |
| BMI | 35.9 ± 5.5 | 36.1 ± 5.2 | 35.3 ± 6.2 | 0.996 | 34.2 ± 6.0 | 34.8 ± 6.2 | 31.3 ± 4.1 | 0.342 | 0.499 |
| %TWL | 18.3 ± 4.4 | 17.8 ± 3.9 | 18.6 ± 4.9 | 0.006 | 18.4 ± 4.5 | 17.9 ± 4.1 | 20.9 ± 5.3 | 0.137 | 0.828 |
| %EWL | 44.9 ± 14.1 | 42.6 ± 12.1 | 47.5 ± 15.7 | 0.019 | 49.5 ± 17.4 | 47.4 ± 15.8 | 60.2 ± 21.3 | 0.020 | 0.011 |
| 6 months postoperative (n, %) | |||||||||
| ESS score | 4.5 ± 4.5 | 4.6 ± 4.5 | 4.4 ± 4.5 | 0.589 | 5.4 ± 4.1 | 6.0 ± 4.0 | 4.4 ± 4.3 | 0.410 | 0.651 |
| FOSQ score | 20 (19.7–20) | 20 (19.8–20) | 20 (19.7–20) | 0.536 | 20 (19.6–20) | 20 (19.1–20) | 20 (19.9–20) | 0.174 | 0.186 |
| Weight | 96.7 ± 19.4 | 101.1 ± 20.5 | 94.6 ± 18.4 | 0.138 | 96.2 ± 19.1 | 99.1 ± 19.9 | 90.0 ± 14.7 | 0.283 | 0.734 |
| BMI | 32.8 ± 5.3 | 34.2 ± 5.3 | 32.1 ± 5.0 | 0.636 | 31.4 ± 5.4 | 32.4 ± 5.6 | 29.2 ± 3.8 | 0.209 | 0.994 |
| %TWL | 25.2 ± 6.0 | 24.5 ± 6.4 | 25.5 ± 5.8 | 0.504 | 25.3 ± 5.6 | 24.1 ± 5.4 | 27.6 ± 5.5 | 0.303 | 0.451 |
| %EWL | 61.9 ± 18.2 | 57.2 ± 17.1 | 64.2 ± 18.3 | 0.128 | 67.1 ± 20.8 | 62.4 ± 19.2 | 76.5 ± 20.8 | 0.106 | 0.721 |
*P-value of comparison between group A and group B
**P-value of comparison between CPAP users and non-users within group A and group B, respectively
Group A: patients with newly diagnosed OSA, group B: patients with pre-existing OSA
BMI body mass index, CPAP continuous positive airway pressure, %EWL percentage excess weight loss, ESS Epworth Sleepiness Scale, FOSQ functional outcomes of sleep questionnaire, %TWL percentage total weight loss