How strong is the evidence for Sleep Apnea Treatment?

Obstructive sleep apnea (OSA) treatment is well supported by multiple clinical reviews describing CPAP as the primary evidence-based therapy, along with a systematic review and network meta-analysis of randomized trials finding myofunctional therapy improves sleepiness and sleep quality as an adjunct treatment, though without significant change in the apnea-hypopnea index itself. That evidence is currently rated strong (75/100), built on 7 published studies -- enough for real confidence in the effect.