Why the study?
Does short or long night sleep duration increase the risk of incident anemia in a Chinese population?
Population
84,791 Chinese participants aged 18-98 years (79.1% men, 20.9% women)
Comparison
Short or long night sleep duration vs 7 h night sleep duration (reference)
Design
Cohort
Follow-up
median 7.9 years
Authors
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Short/long sleep associated with anemia risk; should not change practice pending causal trials.
Does short or long night sleep duration increase the risk of incident anemia in a Chinese population?
Both short (≤6 hours) and long (≥9 hours) night sleep durations are associated with an increased risk of incident anemia, with the risk of long sleep duration being particularly pronounced in women.
Liu et al. (2018) studied this question.
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