From:  The asthma-obstructive sleep apnea overlap: pathophysiological links, clinical impact, and implications for integrated management

 OSA: a pragmatic clinical algorithm.

Clinical phaseKey indicators & validated toolsRecommended clinical actionMeasurable endpoints & outcomes
1. ScreeningSTOP-Bang, Epworth Sleepiness Scale (ESS), clinical history of snoring/apneas.Refer the patient to diagnostic sleep testing if STOP-Bang ≥ 3, ESS ≥ 10, or if high clinical suspicion exists.Successful completion and reporting of diagnostic sleep testing (HST or PSG).
2. DiagnosisObjective Home Sleep Test (HST) or in-laboratory polysomnography (PSG).Categorize objective OSA severity based on the Apnea-Hypopnea Index (AHI); record oxygen desaturation index (ODI) and nadir SpO2.Confirmed baseline values for AHI, ODI, and nadir SpO2.
3. TreatmentBaseline OSA severity index, symptom burden, and documented comorbidities.Initiate auto-adjusting or fixed continuous positive airway pressure (CPAP) therapy; treat concurrent rhinitis/ENT issues; optimize anti-reflux measures; activate a structured weight-loss pathway.Verified objective CPAP adherence metrics; documented changes in ACT/ACQ scores; percentage of total body weight lost; reduction in AHI.
4. Follow-upClinical re-evaluation at 3–6 months post-treatment initiation.Formally reassess objective asthma control metrics (ACT/ACQ); consider repeating HST if a significant clinical response or major weight shift occurs.Stabilization or improvement in asthma control scores; objective resolution of sleep-disordered breathing.

ACT: Asthma Control Test; ACQ: Asthma Control Questionnaire; OSA: obstructive sleep apnea.