Compared to participants without proteinuria, those with proteinuria were older, had a higher education level; were less prevalent to drink currently; were more prevalent to have hypertension, dyslipidemia, atrial fibrillation, and use antihypertensive drugs; had higher resting heart rate, FPG, BMI, SBP, DBP, TG, TC, UA, C-reactive protein (CRP) and Cr (all P < 0.05). Here, CRP is linked to metabolic syndrome.