# Correlation between healthy sleep score and risk of cardia-cerebrovascular disease among people with type 2 diabetes: a prospective cohort study

## TL;DR

Better sleep patterns are linked to a lower risk of heart and brain diseases in people with type 2 diabetes.

## Contribution

This is the first study to investigate the link between sleep patterns and CVD risk in people with type 2 diabetes.

## Key findings

- Each one-point increase in the healthy sleep score reduced CVD risk by 11%.
- People with the highest sleep scores had up to a 43% lower CVD risk compared to those with the lowest scores.

## Abstract

In the general population, healthy sleep pattern is associated with lower risk of cardia-cerebrovascular diseases (CVD). However, despite a high prevalence of sleep disorders in people type 2 diabetes(T2D), no study has investigated the relationship between sleep patterns and the risk of CVD events in this particular subpopulation.

We included 6,363 participants with T2D but free of prevalent CVD at baseline from Kailuan study, a HSS(range 0–5) combining five sleep patterns (sleep duration, snoring, insomnia, early sleep-wake patterns, and excessive daytime sleepiness) was calculated. Cox regression models were used to evaluate the hazard ratios (HRs) and 95% confidence intervals (CIs) of incident CVD.

During a median follow-up of 5.80 years, 790 participants developed first CVD event (12.42%). In multivariate Cox analysis, the risk of CVD decreased by 11% (HR, 0.89; 95% CI 0.83–0.96) per one-point increment in the HSS. Compared to those with a sleep score of 0–1, participants with a score of 4 and 5 had a 26%(HR, 0.73; 95% CI 0.55–0.99) and 43%(HR, 0.58; 95% CI 0.35–0.93) reduced risk of CVD, respectively.

Higher HSS are associated with a lower risk of CVD events in the community people with T2D.