男性，60 岁，SCr 1.4 → eGFR = 51.6942 mL/min/1.73m²（G3a） eGFR = 175 × 1.4^−1.154 × 60^−0.203 = 51.6942 mL/min/1.73 m²。G3a 期（轻中度降低）。{"result":"eGFR = 51.6942 mL/min/1.73 m² (CKD stage G3a — mildly to moderately decreased). Method: simplified MDRD, eGFR = 175·SCr^−1.154·age^−0.203 × 0.742 if female.","metadata":{"input":{"age":60,"sex":"male","serumCreatinine":1.4,"raceCoefficient":false},"result":{"egfr":51.6942,"unit":"mL/min/1.73 m²","ckdStage":"G3a","ckdDescription":"Mildly to moderately decreased","raceCoefficientApplied":false,"method":"Simplified MDRD: eGFR = 175·SCr^−1.154·age^−0.203 × 0.742 if female × 1.212 if Black","model":"Levey AS et al. Ann Intern Med 2006 (IDMS-traceable, constant 175). BSA-indexed. Not medical advice."}}}
女性，50 岁，SCr 1.6，启用种族系数 → eGFR = 41.3523 mL/min/1.73m²（G3b） 不含种族系数：175 × 1.6^−1.154 × 50^−0.203 × 0.742 = 34.1190。启用 1.212：× 1.212 = 41.3523。演示旧版系数。{"result":"eGFR = 41.3523 mL/min/1.73 m² (CKD stage G3b — moderately to severely decreased). Method: simplified MDRD, eGFR = 175·SCr^−1.154·age^−0.203 × 0.742 if female × 1.212 (legacy race coefficient).","metadata":{"input":{"age":50,"sex":"female","serumCreatinine":1.6,"raceCoefficient":true},"result":{"egfr":41.3523,"unit":"mL/min/1.73 m²","ckdStage":"G3b","ckdDescription":"Moderately to severely decreased","raceCoefficientApplied":true,"method":"Simplified MDRD: eGFR = 175·SCr^−1.154·age^−0.203 × 0.742 if female × 1.212 if Black","model":"Levey AS et al. Ann Intern Med 2006 (IDMS-traceable, constant 175). BSA-indexed. Not medical advice."}}}