Table 1.

Keyword clusters for the first stage (2006–2010).

Cluster ID	Cluster keywords	Representative keywords
0	Risk	Metabolic syndrome; nonalcoholic fatty liver disease; fatty liver; risk factor; nonalcoholic steatohepatitis cardiovascular disease; glycemic load; liver tumors; mellitus; body mass
1	Hypertension	Nonalcoholic fatty liver disease; cardiovascular disease; metabolic syndrome; cohort; diabetes mellitus metabolic syndrome; hepatic steatosis; incretin mimetics; metabolic syndromne; nonalcoholic fatty liver disease
2	Alanine aminotransferase	Metabolic syndrome; insulin resistance; cardiovascular disease; nonalcoholic fatty liver disease; systems biology nonalcoholic fatty liver disease; risk factors; systems biology; CVD risk factors; transcription factors
3	Physical activity	Adiposity rebound; behavior modification; eating frequency; school performance; parental BMI childhood obesity; abdominal fat; visceral fat; behavior modification; physical education
4	Nonalcoholic fatty liver disease	Nonalcoholic fatty liver disease; type-2 diabetes; practice guidelines; metabolic risk factors; C-reactive protein metabolic syndrome; cardiovascular disease; risk factors; nonalcoholic steatohepatitis; carotid artery intima-media thickness
5	Nonalcoholic steatohepatitis	Insulin resistance; nonalcoholic fatty liver disease; nonalcoholic steatohepatitis; beta cell; HepG2 cells nonalcoholic fatty liver disease; nonalcoholic steatohepatitis; beta cell; de novo; lipid homeostasis
6	Nutrition examination survey	Insulin resistance; treatment panel; CVD risk factors; nonalcoholic fatty liver disease; obstructive sleep cardiovascular risk; metabolic syndrome; body mass; nutrition examination; United States

BMI = body mass index, CVD = cardiovascular disease.