Logistic regression of univariate analysis to assess for predictors of upper airway stimulation adherence (≥28 h per week) at the final visit

Univariable results
OR (95% CI)p-value
Age at consent1.04 (1.01–1.07)0.01
Sex (female versus male)2.14(0.79–5.77)0.14
BMI at baseline0.90 (0.83–0.97)0.009
Baseline AHI0.98 (0.96–0.999)0.04
Bilateral protrusion versus right protrusion0.92 (0.41–2.11)0.59
Other versus right protrusion1.33 (0.32–5.59)0.62
Change in AHI at post-titration visit1.01 (0.99–1.04)0.19
Change in ESS at post-titration visit0.98 (0.91–1.05)0.57
AHI success at post-titration visit0.99 (0.42–2.34)0.98
Improvement by CGI at post-titration visit0.67 (0.30–1.51)0.33
Patient satisfied or strongly satisfied at post-titration0.60 (0.15–2.47)0.48
Therapy use at post-titration1.08 (1.05–1.11)<0.0001
Therapy use ≥28 h per week at post-titration0.19 (0.07–0.48)0.0004

A multivariable model was fit with stepwise selection used to reduce the model to retain only significant parameters (age, body mass index (BMI), apnoea/hypopnoea index (AHI) and therapy at post-titration) and only BMI and therapy use at post-titration visit was retained. ESS: Epworth sleepiness scale; CGI: Clinical Global Impressions scale.