Assessing cognitive symptoms in severe sleep apnea patients

Exploring Brain Fog Symptoms in Patients With Obstructive Sleep Apnea and CPAP Therapy Impact: A Pilot Study

Observational Fondazione Don Carlo Gnocchi Onlus · NCT06664450

This study is trying to see if people with severe sleep apnea who have been using CPAP for a while have fewer memory and attention problems compared to those who haven't started treatment yet.

Quick facts

Study typeObservational
Enrollment80 (estimated)
Ages18 Years and up
SexAll
SponsorFondazione Don Carlo Gnocchi Onlus Academic / other
Locations1 site (Milan, MI)
Trial IDNCT06664450 on ClinicalTrials.gov

What this trial studies

This observational pilot study aims to evaluate 'Brain Fog'—cognitive symptoms affecting memory, attention, and concentration—in patients with severe Obstructive Sleep Apnea (OSA). It compares two groups: those who have been on CPAP treatment for at least 3 months and those who have not yet started treatment. Participants will complete a 30-minute questionnaire at the Sleep Center Clinic, which includes assessments of daytime sleepiness, sleep quality, and psychophysical fatigue. The study will involve 80 outpatients, evenly divided by age and gender, over a duration of approximately 12 months.

Who should consider this trial

Good fit: Ideal candidates are patients with severe OSA who have either been on CPAP for at least 3 months or are newly diagnosed and not yet treated.

Not a fit: Patients with mild or moderate OSA, or those with neurological, oncological, or psychiatric comorbidities may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance understanding of cognitive impairments in sleep apnea patients and improve treatment approaches.

How similar studies have performed: While studies on cognitive impairment in sleep apnea exist, this specific observational approach focusing on 'Brain Fog' in a comparative manner is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with severe OSA treated with CPAP for at least 3 months.
* Patients with severe OSA in new access and therefore not yet subjected to CPAP treatment.
* Patients with severe OSA who are able to understand the Italian language.

Exclusion Criteria:

* Patients who do not have a certified diagnosis of severe OSA.
* Patients with mild or moderate OSA.
* Patients with OSA who are unable to understand the Italian language.
* Patients with OSA who have neurological and/or oncological comorbidities, as verified by medical records.
* Patients with documented cognitive deficits, as verified by medical records.
* Patients with certified diagnoses of psychiatric disorders and/or substance use disorders (SUD), as verified by medical records.

Where this trial is running

Milan, MI

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Obstructive Sleep ApneaBrain FogCognitive ImpairmentCPAP Therapy
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.