ICD	International Classification of Diseases
BMCDE	Beijing Medical Claim Data for Employees
SD	standard deviation
ARM	association rule mining
HCA	hierarchical cluster analysis
CBD	cerebrovascular disease
IHD	ischaemic heart disease
COPD	chronic obstructive pulmonary disease
DM	diabetes mellitus
DD	depressive disorders
CKD	chronic kidney disease
OARA	osteoarthritis and rheumatoid arthritis
PUD	peptic ulcer disease
HF	heart failure
HT	hypertension
CVD	cardiovascular disease