Journal of Preventive Medicine and Public Health

Original Articles

Association Between Low Muscle Mass and Non-alcoholic Fatty Liver Disease Diagnosed Using Ultrasonography, Magnetic Resonance Imaging Derived Proton Density Fat Fraction, and Comprehensive NAFLD Score in Korea: Hun Ju Lee, Jae Seung Chang, Jhii Hyun Ahn, Moon Young Kim, Kyu-Sang Park, Yeon-Soon Ahn, Sang Baek Koh; J Prev Med Public Health. 2021;54(6):412-421. Published online October 22, 2021; DOI: https://doi.org/10.3961/jpmph.21.387

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Abstract Summary PDF Supplementary Material

Objectives
Non-alcoholic fatty liver disease (NAFLD) is an increasingly prevalent metabolic disease. Muscle is known to influence NAFLD development. Therefore, this study aimed to determine the relationships among low muscle mass, NAFLD, and hepatic fibrosis using various definitions of low muscle mass and NAFLD diagnostic methods, including magnetic resonance imaging-based proton density fat fraction (MRI-PDFF).
Methods
This cross-sectional study included 320 participants (107 males, 213 females) from the Korean Genome and Epidemiology Study on Atherosclerosis Risk of Rural Areas in the Korean General Population cohort. Muscle mass was assessed using whole-body dual-energy X-ray absorptiometry and adjusted for the height squared, body weight, and body mass index (BMI). NAFLD was diagnosed using ultrasonography (US), MRI-PDFF, and the comprehensive NAFLD score (CNS). Hepatic fibrosis was assessed using magnetic resonance elastography. Multivariable logistic and linear regression analyses were performed to determine the aforementioned associations.
Results
According to US, 183 participants (57.2%) had NAFLD. Muscle mass adjusted for body weight was associated with NAFLD diagnosed using US (odds ratio [OR], 3.00; 95% confidence interval [CI], 1.70 to 5.31), MRI-PDFF (OR, 2.00; 95% CI, 1.13 to 3.53), and CNS (OR, 3.39; 95% CI, 1.73 to 6.65) and hepatic fibrosis (males: β=-0.070, p<0.01; females: β=-0.037, p<0.04). Muscle mass adjusted for BMI was associated with NAFLD diagnosed by US (OR, 1.71; 95% CI, 1.02 to 2.86) and CNS (OR, 1.95; 95% CI, 1.04 to 3.65), whereas muscle mass adjusted for height was not associated with NAFLD.
Conclusions
Low muscle mass was associated with NAFLD and liver fibrosis; therefore, maintaining sufficient muscle mass is important to prevent NAFLD. A prospective study and additional consideration of muscle quality are needed to strengthen the findings regarding this association.

Summary

Korean summary
비알콜성 간질환은 대사질환 중 하나로 적은 근육양과의 연관성이 지속적으로 제시되었으나, 기존 연구들에서 일관되지 않은 결과를 보여주었다. KoGES-ARIRANG 코호트의 320명을 대상으로 초음파·MRI-PDFF·CNS 진단기준을 사용하여 단면연구를 수행한 결과, 세 진단기준에서 모두 적은 근육량과 비알콜성 간질환 사이에 연관성이 나타났다.

Citations

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Prevalence of Sarcopenia and Its Defining Components in Non-alcoholic Fatty Liver Disease Varies According to the Method of Assessment and Adjustment: Findings from the UK Biobank
Christine L. Freer, Elena S. George, Sze-Yen Tan, Gavin Abbott, David Scott, Robin M. Daly
Calcified Tissue International.2024;[Epub] CrossRef
Prevalence and outcome of sarcopenia in non-alcoholic fatty liver disease
Suprabhat Giri, Prajna Anirvan, Sumaswi Angadi, Ankita Singh, Anurag Lavekar
World Journal of Gastrointestinal Pathophysiology.2024;[Epub] CrossRef
Association between Regional Body Muscle Mass and Non-Alcoholic Fatty Liver Disease: An Observational Study Using Data from the REACTION Study
Jing Du, Shizhan Ma, Li Fang, Meng Zhao, Zhongshang Yuan, Yiping Cheng, Jiajun Zhao, Xiude Fan, Qingling Guo, Zhongming Wu
Journal of Personalized Medicine.2023; 13(2): 209. CrossRef
Predicting Habitual Use of Wearable Health Devices Among Middle-aged Individuals With Metabolic Syndrome Risk Factors in South Korea: Cross-sectional Study
Jaeyoung Ha, Jungmi Park, Sangyi Lee, Jeong Lee, Jin-Young Choi, Junhyoung Kim, Sung-il Cho, Gyeong-Suk Jeon
JMIR Formative Research.2023; 7: e42087. CrossRef
Osteosarcopenia in NAFLD/MAFLD: An Underappreciated Clinical Problem in Chronic Liver Disease
Alessandra Musio, Federica Perazza, Laura Leoni, Bernardo Stefanini, Elton Dajti, Renata Menozzi, Maria Letizia Petroni, Antonio Colecchia, Federico Ravaioli
International Journal of Molecular Sciences.2023; 24(8): 7517. CrossRef

Relationship Between Non-alcoholic Fatty Liver Disease and Decreased Bone Mineral Density: A Retrospective Cohort Study in Korea: Jisun Sung, Seungho Ryu, Yun-Mi Song, Hae-Kwan Cheong; J Prev Med Public Health. 2020;53(5):342-352. Published online July 17, 2020; DOI: https://doi.org/10.3961/jpmph.20.089

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Abstract PDF

Objectives
The aim of this retrospective cohort study was to investigate whether non-alcoholic fatty liver disease (NAFLD) was associated with incident bone mineral density (BMD) decrease.
Methods
This study included 4536 subjects with normal BMD at baseline. NAFLD was defined as the presence of fatty liver on abdominal ultrasonography without significant alcohol consumption or other causes. Decreased BMD was defined as a diagnosis of osteopenia, osteoporosis, or BMD below the expected range for the patient’s age based on dual-energy X-ray absorptiometry. Cox proportional hazards models were used to estimate the hazard ratio of incident BMD decrease in subjects with or without NAFLD. Subgroup analyses were conducted according to the relevant factors.
Results
Across 13 354 person-years of total follow-up, decreased BMD was observed in 606 subjects, corresponding to an incidence of 45.4 cases per 1000 person-years (median follow-up duration, 2.1 years). In the model adjusted for age and sex, the hazard ratio was 0.65 (95% confidence interval, 0.51 to 0.82), and statistical significance disappeared after adjustment for body mass index (BMI) and cardiometabolic factors. In the subgroup analyses, NAFLD was associated with a lower risk of incident BMD decrease in females even after adjustment for confounders. The direction of the effect of NAFLD on the risk of BMD decrease changed depending on BMI category and body fat percentage, although the impact was statistically insignificant.
Conclusions
NAFLD had a significant protective effect on BMD in females. However, the effects may vary depending on BMI category or body fat percentage.

Summary

Citations

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Anti-osteoporotic treatments in the era of non-alcoholic fatty liver disease: friend or foe
Maria Eleni Chondrogianni, Ioannis Kyrou, Theodoros Androutsakos, Christina-Maria Flessa, Evangelos Menenakos, Kamaljit Kaur Chatha, Yekaterina Aranan, Athanasios G. Papavassiliou, Eva Kassi, Harpal S. Randeva
Frontiers in Endocrinology.2024;[Epub] CrossRef
Association between body fat and bone mineral density in Korean adults: a cohort study
Hyunjung Yoon, Eunju Sung, Jae-Heon Kang, Cheol-Hwan Kim, Hocheol Shin, Eunsol Yoo, Minyoung Kim, Mi Yeon Lee, Sujeong Shin
Scientific Reports.2023;[Epub] CrossRef
Liver fibrosis is associated with impaired bone mineralization and microstructure in obese individuals with non-alcoholic fatty liver disease
Ilaria Barchetta, Carla Lubrano, Flavia Agata Cimini, Sara Dule, Giulia Passarella, Arianna Dellanno, Alberto Di Biasio, Frida Leonetti, Gianfranco Silecchia, Andrea Lenzi, Maria Gisella Cavallo
Hepatology International.2023; 17(2): 357. CrossRef
Non-Alcoholic Fatty Liver Disease and Bone Tissue Metabolism: Current Findings and Future Perspectives
Oxana M. Drapkina, Anastasia Yu. Elkina, Anna F. Sheptulina, Anton R. Kiselev
International Journal of Molecular Sciences.2023; 24(9): 8445. CrossRef
Nonalcoholic Fatty Liver Disease Is Associated With Decreased Bone Mineral Density in Adults: A Systematic Review and Meta‐Analysis
Ying‐Hao Su, Kuo‐Liong Chien, Shu‐Hua Yang, Wei‐Tso Chia, Jen‐Hau Chen, Yen‐Ching Chen
Journal of Bone and Mineral Research.2023; 38(8): 1092. CrossRef
The National Consensus statement on the management of adult patients with non-alcoholic fatty liver disease and main comorbidities
Marina V. Maevskaya, Yulia V. Kotovskaya, Vladimir T. Ivashkin, Olga N. Tkacheva, Ekaterina A. Troshina, Marina V. Shestakova, Valeriy V. Breder, Natalia I. Geyvandova, Vladimir L. Doshchitsin, Ekaterina N. Dudinskaya, Ekaterina V. Ershova, Khava B. Kodzo
Terapevticheskii arkhiv.2022; 94(2): 216. CrossRef
Nonalcoholic fatty liver disease and osteoporosis: A potential association with therapeutic implications
Ilias D. Vachliotis, Athanasios D. Anastasilakis, Antonis Goulas, Dimitrios G. Goulis, Stergios A. Polyzos
Diabetes, Obesity and Metabolism.2022; 24(9): 1702. CrossRef
Hepatic fibrosis is associated with an increased rate of decline in bone mineral density in men with nonalcoholic fatty liver disease
Ji Won Yoon, Min Joo Kim, Goh-Eun Chung, Jong In Yang, Jeong Yoon Yim, Jin Ju Kim, Sun Mie Kim, Min-Sun Kwak
Hepatology International.2021; 15(6): 1347. CrossRef
NAFLD Associated Comorbidity
L. B. Lazebnik, S. V. Turkina
Experimental and Clinical Gastroenterology.2021; (10): 5. CrossRef

Comparison of Computed Tomography-based Abdominal Adiposity Indexes as Predictors of Non-alcoholic Fatty Liver Disease Among Middle-aged Korean Men and Women: Jongmin Baek, Sun Jae Jung, Jee-Seon Shim, Yong Woo Jeon, Eunsun Seo, Hyeon Chang Kim; J Prev Med Public Health. 2020;53(4):256-265. Published online June 18, 2020; DOI: https://doi.org/10.3961/jpmph.20.140

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Abstract PDF Supplementary Material

Objectives
We compared the associations of 3 computed tomography (CT)-based abdominal adiposity indexes with non-alcoholic fatty liver disease (NAFLD) among middle-aged Korean men and women.
Methods
The participants were 1366 men and 2480 women community-dwellers aged 30-64 years. Three abdominal adiposity indexes—visceral fat area (VFA), subcutaneous fat area (SFA), and visceral-to-subcutaneous fat ratio (VSR)—were calculated from abdominal CT scans. NAFLD was determined by calculating the Liver Fat Score from comorbidities and blood tests. An NAFLD prediction model that included waist circumference (WC) as a measure of abdominal adiposity was designated as the base model, to which VFA, SFA, and VSR were added in turn. The area under the receiver operating characteristic curve (AUC), integrated discrimination improvement (IDI), and net reclassification improvement (NRI) were calculated to quantify the additional predictive value of VFA, SFA, and VSR relative to WC.
Results
VFA and VSR were positively associated with NAFLD in both genders. SFA was not significantly associated with NAFLD in men, but it was negatively associated in women. When VFA, SFA, and VSR were added to the WC-based NAFLD prediction model, the AUC improved by 0.013 (p<0.001), 0.001 (p=0.434), and 0.009 (p=0.007) in men and by 0.044 (p<0.001), 0.017 (p<0.001), and 0.046 (p<0.001) in women, respectively. The IDI and NRI were increased the most by VFA in men and VSR in women.
Conclusions
Using CT-based abdominal adiposity indexes in addition to WC may improve the detection of NAFLD. The best predictive indicators were VFA in men and VSR in women.

Summary

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Relationship between Non-Alcoholic Fatty Liver Disease and Visceral Fat Measured by Imaging-Based Body Composition Analysis: A Systematic Review
Ker Ming Seaw, Christiani Jeyakumar Henry, Xinyan Bi
Livers.2023; 3(3): 463. CrossRef
Stratifying the risk of ovarian cancer incidence by histologic subtypes in the Korean Epithelial Ovarian Cancer Study (Ko‐EVE)
Soseul Sung, Youjin Hong, Byoung‐Gie Kim, Ji‐Yeob Choi, Jae Weon Kim, Sang‐Yoon Park, Jae‐Hoon Kim, Yong‐man Kim, Jong‐Min Lee, Tae Jin Kim, Sue K. Park
Cancer Medicine.2023; 12(7): 8742. CrossRef
Correlation between CT Abdominal Anthropometric Measurements and Liver Density in Individuals with Non-Alcoholic Fatty Liver Disease
Dragoș Constantin Cucoranu, Marian Pop, Raluca Niculescu, Vlad Vunvulea, Irina-Bianca Kosovski, Radu-Ovidiu Togănel, Eliza Russu, Adrian Vasile Mureșan, Răzvan-Andrei Licu, Anca Bacârea
Medicina.2023; 59(3): 500. CrossRef

English Abstracts

The Association of Cardiovascular Risk Factors with Nonalcoholic Fatty Liver Disease in Health Checkup Examinees.: Jae Hee Yu, Kang Sook Lee, Seon Young Lee, A Rum Hong, Yong Sang Park; J Prev Med Public Health. 2008;41(6):407-412.; DOI: https://doi.org/10.3961/jpmph.2008.41.6.407

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OBJECTIVES
The purpose of this study was to evaluate the relationship of nonalcoholic fatty liver and cardiovascular risk factors. METHODS: This study was conducted to investigate the association of nonalcoholic fatty liver and cardiovascular risk factors for adult men (n=2976) and women (n=2442) who were over 19 years old, after excluding the HBsAg(+) or anti-HCV(+) patients and the men and women with increased alcohol intake (men: 40 g/week, women: 20 g/week). RESULTS: Compared with the normal liver subjects, the nonalcoholic fatty liver subjects showed a significantly increased frequency of abnormal systolic blood pressure (> or =120 mmHg), fasting blood sugar (> or =100 mg/dL), total cholesterol (> or =200 mg/dL), triglyceride (> or =150 mg/dL), high density lipoprotein cholesterol (<40 mg/dL), low density lipoprotein cholesterol (> or =130g m/dL) and abdominal obesity in men, and all these measures were significantly increased in the women except for abnormal HDL cholesterol. After adjusting for the body mass index, age, smoking, exercise and a nonalcoholic liver, the odds ratios of an abnormal waist hip ratio were 1.35(95% Confidence Interval=1.05-4.72) in the mild fatty liver, 1.61(1.19-2.18) in the moderate fatty liver, 2.77(1.57-4.92) in the severe fatty liver compared with a normal liver. The adjusted odds ratios for abnormal fasting blood sugar were 1.26(1.03-1.53) in the mild fatty liver, 1.62(1.27-2.06) in the moderate fatty lliver and 1.77(1.12-2.78) in the severe fatty liver. The adjusted odds ratios for abnormal triglyceride were 1.38(1.11-1.72) in the mild fatty liver, 1.73(0.33-2.24) in the moderate fatty liver and 1.91(1.17-3.10) in the severe fatty liver of men. Adjusted odds ratios for abnormal triglyceride were 1.50(1.04-2.15) in mild, 1.71(1.07-2.68) in moderate, 1.81(0.69-4.38) in severe fatty liver of women. CONCLUSIONS: The nonalcoholic fatty liver subjects had more cardiovascular risk factors compared with the normal liver subjects. Thus, prevention and treatment of the nonalcoholic fatty liver is necessary by lifestyle modifications such as restriction of alcohol intake, no smoking, exercise and adequate eating habits.

Summary

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Insulin sensitizers for the treatment of non-alcoholic fatty liver disease
Zeynel Abidin Ozturk
World Journal of Hepatology.2014; 6(4): 199. CrossRef
Leitura A Influência da Composição Corporal e Idade no Perfil Hepático e Prostático de Homens do Município de Flores da Cunha/RS
F. Nascimento, E. Borba, A. Philipi, A.C. Guimarães, R. Boff, P. Spada, A. Coitinho, C. Funchal, C. Dani
Ciência em Movimento - Biociências e Saúde.2013; 15(30): 9. CrossRef
Recent advances in nonalcoholic fatty liver disease
Onpan Cheung, Arun J Sanyal
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Recent advances in nonalcoholic fatty liver disease
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Associations of Non Alcoholic Fatty Liver with the Metabolic Syndrome and Serum Carotenoids.: Sun kyun Park, Hyun Jung Lee, Duk Hee Lee, Sung Kook Lee, Byung Yeol Chun, Sung Ae Kim, Hye Sung Lee, Hyo Kyung Son, Sung Hi Kim; J Prev Med Public Health. 2008;41(1):39-44.; DOI: https://doi.org/10.3961/jpmph.2008.41.1.39

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Abstract PDF

OBJECTIVES
This study was conducted to investigate the associations of non alcoholic fatty liver with metabolic syndrome and the serum carotenoids. METHODS: This study was conducted in a general hospital in South Korea from November, 2004 to August, 2005. The study subjects were 350 sampled persons who were aged from 40 years and older (males: 180, females: 170). They were grouped into the normal, mild and severe groups according to fat accumulation in their livers, as determined by ultrasonography. We analyzed the association between non alcoholic fatty liver and metabolic syndrome by multiple logistic regression analysis and we analyzed the association between non alcoholic fatty liver and the serum carotenoids by a general linear model(ANCOVA). RESULTS: After adjustment for the effect of potential covariates, the prevalence of metabolic syndrome was associated with fat accumulation in the liver (p trend <0.001). If the odds ratio of normal group is 1.00, then that of the mild group is 2.80 (95% C.I=1.17-6.71) and that of the severe group is 7.29 (95% C.I=2.76-19.30). The prevalence of metabolic alterations fitting the criteria of metabolic syndrome, according to the class of fat accumulation in the liver, was significantly increased, except for criteria of high blood pressure, a large waist circumference and low HDL (high density lipoprotein) cholesterol level (p trend <0.001). The level of serum beta-carotene was decreased according to the class of fat accumulation in the liver (p trend=0.036), but the levels of serum alpha-carotene, lycopene, bata-cryptoxanthin and lutein were not decreased. CONCLSIONS: This study shows that non alcoholic fatty liver was associated with metabolic syndrome and with the serum beta-carotene level.

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Manash Pratim Pathak, Kalyani Pathak, Riya Saikia, Urvashee Gogoi, Pompy Patowary, Pronobesh Chattopadhyay, Aparoop Das
Heliyon.2023; 9(4): e15347. CrossRef
The Protection Conferred by HSD17B13 rs72613567 Polymorphism on Risk of Steatohepatitis and Fibrosis May Be Limited to Selected Subgroups of Patients With NAFLD
Eduardo Vilar-Gomez, Carlos J. Pirola, Silvia Sookoian, Laura A. Wilson, Tiebing Liang, Naga Chalasani
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Journal of Korean Medical Science.2019;[Epub] CrossRef
Dietary Carotenoids and Non-Alcoholic Fatty Liver Disease among US Adults, NHANES 2003–2014
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Gabriela Villaça Chaves, Sílvia Elaine Pereira, Carlos José Saboya, Daiane Spitz, Camila Santos Rodrigues, Andréa Ramalho
Obesity Surgery.2014; 24(2): 219. CrossRef
Association of oral health behaviors and status with depression: results from the Korean National Health and Nutrition Examination Survey, 2010
Se Jin Park, Ki Dong Ko, Seung-Il Shin, Yu Jeong Ha, Gy Young Kim, Hyoung Ah Kim
Journal of Public Health Dentistry.2014; 74(2): 127. CrossRef
Measuring the burden of chronic diseases in Korea in 2007
E.-J. Kim, S.-J. Yoon, M.-W. Jo, H.-J. Kim
Public Health.2013; 127(9): 806. CrossRef
The Association of Cardiovascular Risk Factors with Nonalcoholic Fatty Liver Disease in Health Checkup Examinees
Jae-Hee Yu, Kang-Sook Lee, Seon-Young Lee, A-Rum Hong, Yong-Sang Park
Journal of Preventive Medicine and Public Health.2008; 41(6): 407. CrossRef

Original Articles

A Study on the Pervalence and Risk Factors of Liver Dysfunction among the Workers in Chemical Factors.: Hae Kwan Cheong, Joung Soom Kim; Korean J Prev Med. 1997;30(1):103-128.

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Abstract PDF: The object of this study is to evaluate the possibility of chemical-induced liver disorder among workers exposed to various chemicals and to classify the the liver function abnormalities by causes and to analyse the risk factors for each liver disorders. A cross-sectional study including questionnaire survey, physical examination, laboratory tests and ultrasonography of liver was conducted on 1,126 workers, 459 workers in a coal chemical plant(company A) and 667 workers in an insulation material manufacturing factory(company B). An industrial hygienist reviewed the chemicals used in both companies and evaluated the work environments to classify the workers by chemical exposure semiquantitatively. The results are as follows; 1. Of 459 workers in company A, 83 workers(18.1 %) are classified as nonexposed, 163(35.5%) as short-term exposure group, 155(33.8 %) as intermediately exposed group and 58(12.6 %) as long-term exposed group based on the mean daily exposure to hepatotoxic chemicals evaluated by an industrial hygienist. Of 667 workers in company B, 484(72.6 %) workers were classified as nonexposed and 183(35.5 %) as exposed. 2. Workers with SGOT level higher than 40 IU/l were 46(10.0 %) in company A and 77(11.5 %) in company B, and those with SGPT level higher than 35 IU/l were 118(25.7 %) in company A and 198(29.7 %) in company B. The differences were not significant between companies and between exposure groups(p>0.05). Workers with ?-GT level higher than 62 IU/l were 29(6.3 %) in company A and 77(11.5 %) in company B(p<0.01). The difference between exposure groups was not significant(p>0.05) within companies. Workers with liver function abnormalities(defined as SGOT higher than 40 IU/l or SGPT higher than 35 IU/l, Ministry of Labor, 1989) were 338(30.0 %) among 1,126 workers. Of 338 workers with liver function abnormalities 139(12.3 %) had fatty liver by ultrasonography, 79(7.0 %) had alcoholic liver(defined as workers with liver function abnormalities with weekly alcohol consumption greater than 280 g for more than 5 years), 54(4.8 %) had hepatitis B, 12(1.1 %) had hepatitis C and the other 114(33.7 %) was not otherwise classified. Prevalences of alcoholic liver and fatty liver were significantly lower in company A(prevalence ratio 0.24 for alcoholic liver, p<0.001; prevalence ratio 0.76 for fatty liver, p<0.05) but prevalences of liver disorders between exposure groups within companies were not significant(p>0.05). 3. Summary prevalence ratios(SPR) of liver function abnormalities, fatty liver and other liver disorders, adjusted by age and company were not significantly higher in exposed group in any chemicals(p>0.05) but in some chemicals, SPRs were significantly lower. 4. On simple analysis of risk factors for liver function abnormalities, prevalence odds ratio(POR) of those with age between 30 and 39 was 1.54(p<0.01) and those with age over 40 was 1.51(p<0.01). POR of those with histories of liver disorders and general anesthesia was 1.77(p<0.001) and 4.02 for those with overweight and 6.23 for those with obesity, defined by body mass index(p<0.001). 5. On logistic regression analysis, risk factors of liver function abnormality were fatty liver(POR 2.92 for grade 1, 12.15 for grade 2), presence of hepatitis B surface antigen(POR 3.62) and obesity(POR 5.38 for overweight and 16.52 for obesity). Presence of hepatitis B surface antigen(POR 0.18) was the only preventive factor of fatty liver. Company(POR 0.30) and obesity(POR 2.49 for overweight, 4.52 for obesity) were related to the alcoholic liver. Obesity(POR 2.94 for overweight) was the only significant risk factor of hepatitis B and there was no significant risk factor for liver function abnormality not otherwise classified. It is concluded that the evidence of liver disorder related with chemical exposure is not evident in these factories. It is also postulated that fatty liver and alcoholic liver is most common causes of liver function abnormalities among workers and effort for weight control and improvement of life style should be done.; Summary

A Baseline Study on the Choice of Optimal Screening Test Items among Workers with Abnormal Liver Function Tests on Workers' Periodic Health Examination.: Hae Kwan Cheong, Hyun Sul Lim, Gyu Hoi Kim; Korean J Prev Med. 1994;27(4):747-762.

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Abstract PDF: Workers', periodic health examination is the main tools used to manage the health problems of most workers in Korea. The most common health problem found in workers' periodic health examination is liver disorder. Liver disorder is also one of the most common health problems in general population and one of the leading causes of mortality in adult population. Regulation proposed by government(NO. 207, Ministry of Labor, 1992) defines the criteria for selection of workers with the liver dysfunction for further evaluative examination and the examination items used for diagnosis of the workers with liver dysfunction. This study was designed to evaluate the proficiency of each examination items presently defined in Regulation and propose the optimal examination items for detection of the liver disorders found by workers' periodic health examination. Study subjects are 186 workers with abnormal liver function tests in screening examination of workers' periodic health ex amination. Questionnaire survey including past history of liver disorder, drinking history, height and weight was done. Physical examination by physician, routine test items defined by Regulation (SGOT, SGPT, gamma- GTP, protein, albumin, total and direct bilirubin, alkaline phoshatase, alpha-feto protein, HBsAg and anti-HBs), anti-HCV antibody test and liver ultrasonography were done. Results are as follows; 1. Result of evaluative examination utilizing only the items defined in Regulation was; There were 75 workers with suspected liver disorder(40.3%), 63 with no liver dysfunction(33.90%), 13 with suspected hepatitis B(7.0%), 10 workers with hepatitis B(5.4%) 10 workers with hepatitis B carrier state(5.4%), 10 with alcoholic liver disorders(5.4%), 5 with fatty liver(2.7%). When alternative diagnostic criteria applying additional examination items (drinking history, body mass index, anti-HCV antibody and ultrasonography) diagnosability of liver disorder was increased. When all four items were included, final results were; 23 workers (l7.8%) with hepatitis B(10 carriers, 13 suspects and 10 hepatitis B), 10(5.4%) with hepatitis C(4 carriers, 5 suspects and 1 hepatitis C), 13(7.0%) with alcoholic liver disorder, 45 (24.2%) with fatty liver (40 suspects, 5 fatty liver), 41 0%) with suspected liver disorders and 44(23.7%) with normal liver. 2. Of examination items defined by Regulation, only SGOT, SGPT, gamma-GTP and HBsAg were significantly different in abnormal rate and mean value, and all other laboratory findings did not showed significant difference between two groups. Drinking history, body mass index and anti-HCV antibody test which are the items that authors included in this study, also showed significant difference between two groups. Utilization of body mass index(BMI) for abnormal liver function group in diagnosis of fatty liver had high specificity(97.6%) but sensitivity (22.3%) was low. Therefore we suggest that SGOT, SGPT, gamma-GTP, HBsAg, alcohol drinking history, BMI and anti-Hcv Ab were useful for diagnosis of liver disorders among worker's periodic health examination.; Summary

A Cross-sectional Study on the Risk Factors Related to Fatty Liver.: S H Ohm, B C Yoo, S J Kim, C U Lee, K T Pai, S C Kim, H R Shin; Korean J Prev Med. 1993;26(2):179-191.

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Abstract PDF: Generally fatty liver is attributed either to chronic alcoholism, diabetes mellitus, or obesity. Based upon this commonly held clinical brief, this study was conducted to investigate the contributing factors of fatty liver and odds ratio (OR) of known contributing factors. A sample of 310 male participants, who visited at Seoul Paik Automated Multiphasic Health Testing System from November 1991 to December 1991, was separated into 112 cases and 198 controls by ultrasonographic finding. There were statistically significant difference between fatty liver and normal in triglyceride(TG), body mass index(BMI), alanine aminotransferase(ALT), high density lipoprotein cholesterol (HDL-C), fasting blood sugar (FBS), alcohol consumption, low density lipoprotein cholesterol (LDL-C), total cholesterol, gamma-glutamyl transferase (gamma-GT), duration of alcohol intake and alkaline phospahtase (Alk.P)(P<0.01, P<0.05). The statistically significant elevated odds ratio were noted for TG (4.48, confidence interval (CI) 2.66-7.55, P=0.000), alcohol consumption(3.24, CI 1.56-6.23, P=0.002), BMI(3.05, CI 1.87-4.97, P=0.000), and FBS(2.59, CI 1.53-4.40, P=0.000). In summary, it is suggested that the fatty liver could be preventive by avoiding such deleterious factors as high fat diet, alcohol and obesity.; Summary

A cross-sectional study on prevalence rate and contributing factors of fatty liver diagnosed by ultrasonography.: Jae Eog Ahn, Jung Oh Ham, Kyu Yoon Hwang, Joo Ja Kim, Byung Kook Lee, Tack Sung Nam, Joung Soon Kim, Hun Kim; Korean J Prev Med. 1991;24(2):195-210.

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Abstract PDF: Fatty liver is caused by derangement of fat metabolism and can be reversed by removal of contributing factors. The contributing factors of fatty liver is known to be overweight, chronic alcoholism, diabetes mellitus, malnutrition, and drug abuse such as tetracycline. This study was carried out on 1335 persons who visited 'Soon Chun Hyang Human Dock Center' from March to June 1990. In analysis of the data, prevalence of fatty liver diagnosed by ultrasonogram by age and sex, laboratory finding between fatty liver group and normal group, and odds ratio of known contributing factors, were compared. The results obtained are as following; 1) The prevalence rate of fatty liver diagnosed by ultrasonogram is 29.6% in male and 11.5% in female. 2) Age groups with high prevalences are 40~50's in male (32.0%) and 50's in female (24.5%). 3) The fatty liver shows significant association with style (p<0.05), whereas not with hepatitis B-virus surface antigen (p>0.05). 4) All laboratory values except alkaline phosphatase and bilirubin are elevated significantly in accordance with the degree of fatty liver (p<0.01). 5) Fatty liver diagnosed by ultrasonogram showed so strong associations with body index, triglycerides and gamma-glutamyl transferase for males, and body index and fasting blood sugar for females that these factors may be used as supplementary data in establishing diagnosis of fatty liver. 6) Odds ratio of contributing factors are as follows; If the odds ratio of below 29 year of age is 1.0 then that of 30~39 is 1.74 (p=0.33), 40~49 is 2.47 (p=0.10), 50~59 is 2.86 (p=0.0570), over 60 is 1.81 (p=0.34). If the odds ratio of female is 1.0 then that of male is 5.67 (p<0.01). If the odds ratio of body index below zero is 1.0 then that of 0~9 is 5.08 (p<0.01), 10~19 is 12.37 (p<0.01), 20~29 is 29.19 (p<0.01), 30 above is 154.02 (p<0.01). If the odds ratio of below 99 mg/dl FBS is 1.0 then that of 100~120 is 106 (p=0.76), over 120 is 1.91 (p=0.02). If the odds ratio of below 29 micron/1 gamma-GT is 1.0 then that of 30~s59 is 2.11 (p<0.01), 60~90 is 1.87 (p<0.05), 90 above is 1.69 (p=0.15). If the odds ratio of below 149 mg/dl TG is 1.0 then 150~199 is 1.49 (p=0.05), 200~250 is 1.09 (p=0.77), 250 above is 2.53 (p<0.01). In summary, early diagnosis of fatty liver could be made by ultrasonogram supplemented with body index and serum triglyceride. The fatty liver could be preventive by avoiding contributing factors such as obesity, alcohol intake, high blood sugar appropriately.; Summary

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