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 ORIGINAL ARTICLE
Year : 2017  |  Volume : 63  |  Issue : 4  |  Page : 226-231

Insomnia and risk of nonalcoholic fatty liver disease: A systematic review and meta-analysis


1 Department of Internal Medicine, Bassett Medical Center, Cooperstown, NY, USA
2 Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
3 Department of Internal Medicine, Division of Rheumatology, Rochester, Minnesota, USA; Department of Medicine, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand

Correspondence Address:
K Wijarnpreecha
Department of Internal Medicine, Bassett Medical Center, Cooperstown, NY
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jpgm.JPGM_140_17

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Aim: This sudy aims to investigate the association between insomnia or excessive daytime sleepiness (EDS) and risk of nonalcoholic fatty liver disease (NAFLD). Methods: We searched published studies indexed in MEDLINE and EMBASE database from inception to December 2015. Studies that reported odds ratios (ORs), risk ratios, hazard ratios or standardized incidence ratio with 95% confidence intervals (CI) comparing the risk of NAFLD among participants who had insomnia or EDS versus those without insomnia or EDS were included. Pooled ORs and 95% CI were calculated using a random-effect, generic inverse variance method of DerSimonian and Laird. Cochran's Q test and I2 statistic were used to determine the between-study heterogeneity. Results: Our search strategy yielded 2117 potentially relevant articles (781 articles from MEDLINE and 1336 articles from EMBASE). After comprehensive review, seven studies (three cross-sectional studies and four case–control studies) were found to be eligible and were included in the meta-analysis. The risk of NAFLD in participants who had insomnia was significantly higher with the pooled OR of 1.13 (95% CI, 1.00–1.27). The statistical heterogeneity was moderate with an I2 of 62%. Elevated risk of NAFLD was also observed among participants with EDS even though the 95% CI was wider and did not reach statistical significance (pooled OR 2.21; 95% CI, 0.84–5.82). The statistical heterogeneity was moderate with an I2 of 62%. Conclusions: Our study demonstrated an increased risk of NAFLD among participants who had insomnia or EDS. Whether this association is causal needs further investigations.






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Online since 12th February '04
2004 - Journal of Postgraduate Medicine
Official Publication of the Staff Society of the Seth GS Medical College and KEM Hospital, Mumbai, India
Published by Wolters Kluwer - Medknow