The Study
The U-Shaped Association between Sleep Duration, All-Cause Mortality and Cardiovascular Risk in a Hispanic/Latino Clinically Based Cohort
This study found that people who sleep too little or too much were more likely to die or have heart problems later — but it doesn’t prove that sleep length caused those problems. Maybe people who sleep too little are stressed or sick, and that’s what’s really causing the issues.
Analysis score
Maximum 72 for a cohort study.
Where the score came from
People who sleep too little (6 hours or less) or too much (9 hours or more) are more likely to die sooner or have heart problems in 10 years than those who sleep 6 to 9 hours.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 559 / 100
Quality score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 2.5x to 4x higher risk of dying is a very large increase, meaning sleep duration matters a lot for long-term health.
- 2People who slept 6 hours or less had 2.5 times higher risk of dying; those who slept 9 hours or more had 4 times higher risk, compared to people who slept 6–9 hours.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of Clinical Medicine
Year
2023
Authors
Mario Henriquez-beltran, J. Dreyse, J. Jorquera, Jorge Jorquera-Díaz, Constanza Salas, Isabel Fernandez-Bussy, G. Labarca
Related Content
Claims (6)
If you sleep 8 to 9 hours every night, you’re less likely to have heart problems later on.
People in this group who say they sleep 9 hours or more each night are nearly four times more likely to die from any cause than those who sleep 6 to 9 hours, even when you account for heart problems and sleep apnea.
People who sleep between 6 and 9 hours a night seem to have the lowest risk of heart problems in the next 10 years — those who sleep less or more than that have higher risk, at least in Hispanic/Latino adults.
People in this group who say they sleep 6 hours or less each night are more than twice as likely to die from any cause compared to those who sleep 6 to 9 hours—even if they have heart problems or sleep apnea.
People who say they sleep either too little (6 hours or less) or too much (9 hours or more) tend to have a higher chance of having a heart problem in the next 10 years, compared to those who sleep between 6 and 9 hours — at least in this group of Hispanic/Latino patients.
People who sleep too little or too much are more likely to die sooner, even if they don’t have severe sleep apnea — which suggests that how long you sleep might be harmful all on its own.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.