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Int J Chron Obstruct Pulmon Dis. 2018 Aug 28;13:2603-2611. doi: 10.2147/COPD.S166902. eCollection 2018.

Relationship between obstructive lung disease and non-alcoholic fatty liver disease in the Korean population: Korea National Health and Nutrition Examination Survey, 2007-2010.

Author information

1
Division of Pulmonary Medicine, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea, tearpoem9@gmail.com.
2
Center for Preventive Medicine and Public Health, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do, Korea.
3
Division of Endocrinology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Korea.
4
Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do, Korea, tearpoem9@gmail.com.

Abstract

Purpose:

Previous studies have shown that progressive forms of non-alcoholic fatty liver disease (NAFLD) occur frequently in patients with obstructive lung disease (OLD). However, few studies have written about this relationship. This study aimed to investigate the relationship between OLD and NAFLD.

Subjects and methods:

The Korea National Health and Nutrition Examination Survey is a national population-based, cross-sectional surveillance program that was initiated to assess the health and nutritional status of the Korean population. From 2007 to 2010, 11,738 subjects were enrolled. The subjects were defined as having NAFLD when they had scores higher than -0.640 in a NAFLD liver fat score prediction model, which was a previously validated prediction score. Individuals with forced expiratory volume in one second/forced vital capacity <0.7 were considered to have OLD. The subjects were divided into non-OLD and OLD groups and non-NAFLD and NAFLD groups. All analyses were performed using sample weighting using the complex samples plan.

Results:

The prevalences of NAFLD and OLD were 30.2% and 8.9%, respectively. Although not statistically significant, subjects in the NAFLD group involved a higher tendency of having OLD than did those in the non-NAFLD group (8.5% vs 10.0%, respectively, P=0.060). Subjects with OLD showed a higher tendency to have NAFLD than non-OLD subjects (30.0% vs 33.7%, respectively, P=0.060). NAFLD subjects were at higher odds of OLD (odds ratio=1.334; 95% confidence interval=1.108-1.607, P=0.002) than non-NAFLD subjects, after adjusting for age, sex, and smoking history. OLD subjects were at higher odds of NAFLD (odds ratio=1.556; 95% confidence interval=1.288-1.879, P<0.001) than non-OLD subjects, after adjusting for age, sex, and smoking history.

Conclusion:

This study showed that NAFLD is related to OLD. Clinicians should be aware of possible liver comorbidities in OLD patients and that extrahepatic disease in NAFLD patients may vary more than previously thought.

KEYWORDS:

comorbidities; epidemiology; non-alcoholic fatty liver disease; obstructive lung disease

PMID:
30214178
PMCID:
PMC6118278
DOI:
10.2147/COPD.S166902
[Indexed for MEDLINE]
Free PMC Article

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