Construction Formula of Biological Age Using the Principal Component Analysis

Table 2

General description of test items.

Test items	Researches
Basic information (age, gender, height, body fat, and blood pressure)	[7, 11, 12, 17–25]
Blood routine	[7, 12, 17–25]
Blood chemistry	[7, 12, 17–25]
Urine routine	[7, 12, 20–25]
Pulmonary function	[7, 12, 17–24]
Cardiovascular ultrasound	[12, 24, 25]
Carotid artery ultrasound	[12, 24, 25]
Sexual hormone	[12]
Electrocardiograph	[7, 12, 23, 25]
Chest radiography	[7, 12, 23]
Abdomen ultrasound	[23]
Gastrointestinal endoscopy	[23]
Questionnaire of living habits	[7, 12, 21, 24, 25]
Genetics	[24, 25]