Objective To study the prevalence of metabolic syndrome(Met S) and its components, and analyze its risk factors among urban inhabitants(More than 5 years) aged 20-74 years old in Lanzhou, Gansu province, comparing the differences among different diagnostic criterions for MetS. Methods A stratified, cluster and random sampling des ign was used to select participants who were 20-74 years old living in their local residence for at least 5 years, From September 2013 to December 2014. There are 2996 participants...