Koraishy FM, et al. - Researchers looked for the risk factors of fast glomerular filtration rate (GFR) decline and progression to chronic kidney disease (CKD) among primary care patients without CKD. They reported infrequent GFR checking in these patients. Common findings in both fast decliners and those who developed incident CKD included older age, African-American race, unmarried status, hypertension and type 2 diabetes. Association of lower neighborhood socioeconomic status, current smoking and baseline estimated (e)GFR 90–119 ml/min/1.73 m² with fast decline, and of baseline eGFR 60–74 ml/min/1.73 m² with incident CKD was observed. Closer monitoring of renal function was recommended for patients at high risk of progressive CKD.