A method for calculating glomerular filtration rate (GFR) is revealed. A circumference of a patent's neck is measured and then is substituted into an exponential formula together with clinical factors and patient's age for estimating GFR. The present method has a better performance compared with methods for evaluating renal function by GFR available now. The methods available now have poor performance in prediction of loss of renal function at early stage. Some patients are diagnosed at an advanced stage so that they miss the opportunity of early treatment.本發明係有關一種計算腎絲球過濾率之方法，藉由量測頸部之周長，並與臨床因子和年齡帶入指數方程式，來評估腎絲球過濾率。藉此改善目前判斷腎功能的腎絲球過濾率所使用的方法，目前所使用的方法對於早期的腎功能喪失的預測能力較差，部分患者往往在發現時已經進入中後期腎病，進而失去了早期治療的機會。
