Association between high fatty liver index and development of colorectal cancer: a nationwide cohort study with 21,592,374 Korean.
BACKGROUND/AIMS
In Korea, the incidence of colorectal cancer (CRC) and nonalcoholic fatty liver disease (NAFLD) has increased due to a westernized lifestyle. This study investigated whether a high fatty liver index that reflects NAFLD correlates with CRC.


METHODS
Data from the National Health Insurance Corporation 2009 to 2012 were analyzed. NAFLD disease was defined as a fatty liver index > 60 in the absence of alcohol consumption of ≥ 30 g/day.


RESULTS
NAFLD was identified in 2,543,649 (11.8%) of 21,592,374 participants. CRC was identified in 19,785 (0.8%) of participants with NAFLD (fatty liver index ≥ 60) and in 80,871 (0.6%) participants without NAFLD (fatty liver index < 30). Multivariate logistic regression analysis demonstrated an independent association between NAFLD and CRC after adjusting for other confounders (hazard ratio, 1.13; odds ratio, 1.12 to 1.15). In subgroup analyses, fatty liver index ≥ 60 was associated with CRC regardless of body mass index, but the association was more prominent in persons with a normal index. NAFLD, in the absence of diabetes, hypertension, or dyslipidemia, was more highly associated with CRC than when one or more of these conditions are present.


CONCLUSION
CRC should be considered as a possibility in patients with fatty liver index ≥ 60, even in the absence of obesity or other metabolic syndromes.
['Choi|Yoon Jin|YJ|', 'Lee|Dong Ho|DH|', 'Han|Kyung-Do|KD|']
D000328:Adult D015992:Body Mass Index D015331:Cohort Studies D015179:Colorectal Neoplasms D005260:Female D006801:Humans D008297:Male D008875:Middle Aged D065626:Non-alcoholic Fatty Liver Disease D056910:Republic of Korea D012307:Risk Factors
Metabolic syndrome Colorectal neoplasms Non-alcoholic fatty liver disease