Sleep apnoea and memory

Sleep apnoea symptoms and prevalence in people attending memory services

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN11309942

Enrollment

453

Registered

2025-11-11

Start date

2025-11-28

Completion date

Unknown

Last updated

2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sleep apnoea in patients attending memory clinics Nervous System Diseases

Interventions

Main study Participants will be asked to complete questionnaires to identify risk factors and symptoms relating to sleep apnoea and undergo a night of sleep apnoea screening using the WatchPAT polygr

Eligibility

Sex/Gender

All

Age

18 Years to 99 Years

Inclusion criteria

Inclusion criteria: 1. Patient attending an NHS memory clinic at an included recruitment site 2. Adults aged 18 or over 3. Patients who are able to consent for themselves Bloods sub-study only 1. New diagnosis of sleep apnoea 2. Recruited at the Bristol recruitment site 3. Referred to the sleep clinic 4. Consented to optional bloods sub-study when joining the study

Exclusion criteria

Exclusion criteria: 1. Adults without capacity to consent to the research study. 2. Being unwilling to use the WatchPAT device. Bloods sub-study only 1. Being unwilling or unable to travel to the Bristol Brain Centre for blood tests, where blood tests at home are not feasible.

Design outcomes

Primary

Measure	Time frame
The proportion of people in memory clinics who have at least mild sleep apnoea (Oxygen Desaturation Index 3% > 5) according to a single night of overnight polygraphy (WatchPAT)	—

Secondary

Measure	Time frame
1. The proportion of people with different aetiological diagnoses in memory clinics who have at least mild sleep apnoea (Oxygen Desaturation Index (ODI)3% > 5) according to a single night of overnight polygraphy (WatchPAT). 2. The proportion of people in memory clinics who have mild (ODI 3% > 5-15), moderate (ODI 3% > 15-30) or severe (ODI 3% > >30) sleep apnoea according to a single night of overnight polygraphy (WatchPAT). 3. Proportion of people in memory clinics who have at least mild sleep apnoea (Oxygen Desaturation Index 4% > 5) according to a single night of overnight polygraphy (WatchPAT). 4. Diagnostic accuracy of STOP-BANG, Epworth Sleepiness scale and extra questions for at least mild sleep apnoea 5. Data completeness for online (or telephone, face-to-face) questionnaires in this population.	—

Measure

Time frame

1. The proportion of people with different aetiological diagnoses in memory clinics who have at least mild sleep apnoea (Oxygen Desaturation Index (ODI)3% > 5) according to a single night of overnight polygraphy (WatchPAT). 2. The proportion of people in memory clinics who have mild (ODI 3% > 5-15), moderate (ODI 3% > 15-30) or severe (ODI 3% > >30) sleep apnoea according to a single night of overnight polygraphy (WatchPAT). 3. Proportion of people in memory clinics who have at least mild sleep apnoea (Oxygen Desaturation Index 4% > 5) according to a single night of overnight polygraphy (WatchPAT). 4. Diagnostic accuracy of STOP-BANG, Epworth Sleepiness scale and extra questions for at least mild sleep apnoea 5. Data completeness for online (or telephone, face-to-face) questionnaires in this population.

—

Countries

England, United Kingdom

Contacts

Public ContactVictoria Gabb

victoria.gabb@bristol.ac.uk0117 456 0700

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Sep 19, 2026