Association between sleep quality and type 2 diabetes at 20-year follow-up in the Southall and Brent REvisited (SABRE) cohort: a triethnic analysis.

J Epidemiol Community Health

MRC Unit for Lifelong Health and Ageing, Department of Population Science and Experimental Medicine, Institute of Cardiovascular Science, University College London, London, UK.

Published: November 2021

AI Article Synopsis

  • The study examines how poor sleep quality affects the risk of developing type 2 diabetes, especially focusing on South-Asian and African-Caribbean men compared to Europeans.
  • It analyzed data from 2,189 participants over 19 years, looking at factors like snoring and sleep disruptions in relation to diabetes onset.
  • Findings showed that snoring increased diabetes risk specifically in South-Asians but there was no significant overall link between sleep quality and diabetes risk among different ethnic groups.

Article Abstract

Background: The risk of developing type 2 diabetes associated with poor sleep quality is comparable to other lifestyle factors (eg, overweight, physical inactivity). In the UK, these risk factors could not explain the two to three-fold excess risks in South-Asian and African-Caribbean men compared with Europeans. This study investigates (1) the association between mid-life sleep quality and later-life type 2 diabetes risk and (2) the potential modifying effect of ethnicity.

Methods: The Southall and Brent REvisited cohort is composed of Europeans, South-Asians and African-Caribbeans (median follow-up 19 years). Complete-case analysis was performed on 2189 participants without diabetes at baseline (age=51.7±7 SD). Competing risks regressions were used to estimate the HRs of developing diabetes associated with self-reported baseline sleep (difficulty falling asleep, early morning waking, waking up tired, snoring and a composite sleep score), adjusting for confounders. Modifying effects of ethnicity were analysed by conducting interaction tests and ethnicity-stratified analyses.

Results: There were 484 occurrences of incident type 2 diabetes (22%). Overall, there were no associations between sleep exposures and diabetes risk. Interaction tests suggested a possible modifying effect for South-Asians compared with Europeans for snoring only (p=0.056). The ethnicity-stratified analysis found an association with snoring among South-Asians (HR 1.41, 95% CI 1.08 to 1.85), comparing those who snored often/always versus occasionally/never. There were no elevated risks for the other sleep exposures.

Conclusion: The association between snoring and type 2 diabetes appeared to be modified by ethnicity, and was strongest in South-Asians.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8515117PMC
http://dx.doi.org/10.1136/jech-2020-215796DOI Listing

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