Lower GFR was associated with increased rates of cardiovascular disease or myocardial infarction in the short and long term , even after adjustment ( GFR < 30 vs 90 mL/min/1 .73 m ( 2 ) ; hazard ratio [ HR ] : 3.24 [ 95 % confidence interval { CI } : 1.26-8 .38 ] through 7 days and HR : 2.12 [ 95 % CI : 1.33-3 .39 ] through 1 year ) .