Research

Mixed

Untreated sleep-disordered breathing (SDB), particularly obstructive sleep apnea (OSA), is an independent risk factor for incident stroke and recurrent vascular events, with risk increasing with apnea-hypopnea index (AHI).

If you snore loudly or feel excessively sleepy during the day, get tested for sleep apnea. Treating it with CPAP or other therapies can significantly lower your risk of having a stroke or having another one if you've already had one. It is not just 'bad breathing'; it is a direct threat to your cardiovascular health.

GoodSupportsHIGH confidence
A meta-analysis of prospective and population-based studies concluded that SDB is an independent stroke predictor (OR 2.24; CI 1.57–3.19). Stroke risk increased with AHI.
Dirk M. Hermann et al. · Neurology · 2016

Why this rating

Supported by multiple large population-based cohorts and meta-analyses, though some individual studies had limited power or adjustment.

Source

Role of sleep-disordered breathing and sleep-wake disturbances for stroke and stroke recovery

Dirk M. Hermann et al. · Neurology · 2016

DOI 10.1212/wnl.0000000000003037

narrative_reviewCited 224×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →