30Mar 2022
Obstructive Sleep Apnea Symptom Subtypes and Cardiovascular Risk: Conflicting Evidence to an Important Question

Obstructive Sleep Apnea Symptom Subtypes and Cardiovascular Risk: Conflicting Evidence to an Important Question

The recent paper by Trzepizur and colleagues extends to evidence that obstructive sleep apnea (OSA) is heterogeneous. The authors studied a clinical cohort of 5,358 patients with OSA and no evidence of overt cardiovascular disease (one-third had hypertension) from seven sleep centres. They found similar symptom subtypes discovered in the Icelandic Sleep Apnea Cohort and replicated in population-based and clinical cohorts. Larger studies with more comprehensive control for covariates and more attention to CPAP treatment as a confounder are needed. Including patients with mild OSA and limited sleepiness-related symptoms may contribute to their results. The study asserts that claiming “subtypes based on OSA symptoms have no independent predictive value in clinical-based samples” is premature and not supported by the overall evidence.

  • #critical care

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