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Updated: Jan 13, 2026

Noninvasive, High-throughput Determination of Sleep Duration in Rodents
Published on: April 18, 2018
Evaluating the causal connections between sleep duration and disease prevalence: A comprehensive systematic review
Zhihui Wang1, Lingyu Yao2, Mengyue Tu3
1Department of Pediatrics, The Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China.
Background:
The causal link between sleep duration and diverse health conditions remains unconfirmed. This meta-analysis aimed to clarify these relationships by synthesizing Mendelian randomization (MR) study evidence.
Methods:
PubMed was systematically searched up to February 15, 2024, for MR studies exploring genetic predispositions to sleep duration/insomnia (short/long/overall sleep duration, insomnia) and associations with circulatory, digestive, neurodegenerative, metabolic diseases, and cancers. Eligible effect estimates were meta-analyzed.
Results:
Fifty-one MR studies were included. Genetic variations in sleep traits were strongly linked to elevated risk of 12 cardiovascular diseases, obesity-related metrics (Type 2 diabetes, fasting glucose/insulin, HbA1c), neurological disorders (Alzheimer, amyotrophic lateral sclerosis, Parkinson disease), mental health conditions (attention-deficit/hyperactivity disorder, autism, bipolar disorder, major depressive disorder, schizophrenia), inflammatory bowel disease, and lung cancer.
Conclusion:
Genetic evidence confirms causal associations between sleep characteristics and multiple diseases, emphasizing sleep's key role in health promotion and supporting personalized sleep management to reduce disease risk.
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