Table 2.

Keyword clusters for the second stage (2011–2015).

Cluster ID	Cluster keywords	Representative keywords
0	Association	Nonalcoholic fatty liver disease; cholesterol-lowering drugs; all-cause mortality; non-cardiovascular mortality; coronary artery disease metabolic syndrome; liver disease; coronary artery disease; arterial stiffness; metabolic control
1	Nonalcoholic fatty liver disease	Nonalcoholic fatty liver disease; metabolic syndrome; alanine aminotransferase; nonalcoholic steatohepatitis; aspartate aminotransferase nonalcoholic fatty liver disease; omega-3 fatty acids; fatty acids; controlled trial; arterial stiffness
2	Vitamin E	Fatty liver; metabolic syndrome; nonalcoholic steatohepatitis; hepatic steatosis; growth hormone nonalcoholic fatty liver disease; nonalcoholic steatohepatitis; clinical trials; coronary artery disease; obesity fatty liver
3	Oxidative stress	Nonalcoholic fatty liver disease; metabolic syndrome; lipid metabolism; hepatic metabolic pathways; aerobic capacity nonalcoholic fatty liver disease; insulin resistance; gut microbiota; coronary artery disease; hepatic metabolic pathways
4	Blood pressure	Metabolic syndrome; nonalcoholic fatty liver disease; hepatic metabolic pathways; antioxidant status; aerobic capacity nonalcoholic fatty liver disease; novo lipogenesis; hepatic metabolic pathways; obstructive sleep; body mass
5	Children	Nonalcoholic fatty liver disease; carotid intima-media thickness; ventricular hypertrophy; liver cirrhosis; systolic diameter nonalcoholic fatty liver disease; high-density lipoprotein cholesterol; cardiovascular disease risk; nonalcoholic steatohepatitis; arterial stiffness
6	Genome wide association	NAFLD; genome wide association; TM6SF2 variant; confers susceptibility; PNPLA3 metabolic syndrome; risk factors; carbohydrate; steatosis; saturated fat
7	Transient elastography	Nonalcoholic fatty liver disease; mitochondrial dysfunction; nonalcoholic steatohepatitis; isobutyl-isonitrile liver scintigraphy; coronary artery disease nonalcoholic fatty liver disease; chronic kidney disease; diabetes mellitus; coronary computed tomography angiography; coronary artery disease

NAFLD = nonalcoholic fatty liver disease.