AIP and hypertensive disorder: The GFR was inversely and strongly associated with AIP, Lp(a), and hypertension and moderately associated with pulse pressure and smoking (p < 0.001, p = 0.01, p = 0.01, p = 0.02 and p = 0.02, respectively), and it was positively and moderately associated with age (p = 0.05).