The Claim
In middle-aged and older adults, objectively measured sleep duration of 5 hours or less is associated with a significantly higher risk of all-cause and cardiovascular disease mortality compared to 7 to 8 hours of sleep, with hazard ratios up to 2.43 for all-cause mortality and 2.31 for cardiovascular mortality, indicating that insufficient sleep, as measured by polysomnography, is a strong predictor of premature death.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
People who sleep 5 hours or less each night are more likely to die sooner from any cause or from heart problems than those who sleep 7 to 8 hours, according to sleep measurements taken in labs.
See the scientific wording
In middle-aged and older adults, objectively measured sleep duration of 5 hours or less is associated with a significantly higher risk of all-cause and cardiovascular disease mortality compared to 7 to 8 hours of sleep, with hazard ratios up to 2.43 for all-cause and 2.31 for cardiovascular mortality, suggesting that insufficient sleep, as measured by polysomnography, is a strong predictor of premature death.
What the research says
1 studyThis study used machines to measure how long people actually slept and found that those who slept 5 hours or less were much more likely to die early from heart problems or other causes than those who slept 7–8 hours, which matches the claim.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.