Sleep duration, mortality and the influence of age.

Eur J Epidemiol · 2017 · PMC5680380 · PMID 28856478

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highly significantno p-value reported

As expected from the PH assumption test on the exposure, the interaction between sleep duration and age as binary was highly significant ( p value 0.006) and in the age stratified analyses the PH assumption was satisfied in both age groups.

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