Circadian Misalignment and Hepatocellular Carcinoma Incidence in the United States

Circadian misalignment may increase the risk of developing hepatocellular carcinoma (HCC). The aim of this study was to examine the association between distance from time zone meridian, a proxy for circadian misalignment, and HCC risk in the United States adjusting for known HCC risk factors. Survei...

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Bibliographic Details
Published in:Cancer epidemiology, biomarkers & prevention biomarkers & prevention, 2018-07, Vol.27 (7), p.719-727
Main Authors: VoPham, Trang, Weaver, Matthew D, Vetter, Céline, Hart, Jaime E, Tamimi, Rulla M, Laden, Francine, Bertrand, Kimberly A
Format: Article
Language:English
Subjects:
Bioindicators
Circadian rhythms
Demographics
Diagnosis
Environmental factors
Epidemiology
Geographic information systems
Health risks
Hepatocellular carcinoma
Incidence
Liver cancer
Minority & ethnic groups
Occupational health
Poisson density functions
Risk factors
Shift work
Socioeconomics
Statistical analysis
Working conditions
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Summary:Circadian misalignment may increase the risk of developing hepatocellular carcinoma (HCC). The aim of this study was to examine the association between distance from time zone meridian, a proxy for circadian misalignment, and HCC risk in the United States adjusting for known HCC risk factors. Surveillance, Epidemiology, and End Results (SEER) provided information on 56,347 HCC cases diagnosed between 2000 and 2014 from 16 population-based cancer registries in the United States. Distance from time zone meridian was estimated using the location of each SEER county's Center of Population in a geographic information system. Poisson regression with robust variance estimation was used to calculate incidence rate ratios (IRRs) and 95% confidence intervals (CIs) for the association between distance from time zone meridian and HCC risk adjusting for individual-level age at diagnosis, sex, race/ethnicity, year of diagnosis, SEER registry, and county-level prevalence of health conditions, lifestyle factors, shift work occupation, socioeconomic status, and demographic and environmental factors. A 5-degree increase in longitude moving east to west within a time zone was associated with a statistically significant increased risk for HCC (IRR, 1.07; 95% CI, 1.01-1.14, = 0.03). A statistically significant positive association was observed among those
ISSN:1055-9965
1538-7755
DOI:10.1158/1055-9965.EPI-17-1052