Serum cystatin C: A useful marker of kidney function in very old people
Background: Serum creatinine-based estimates of GFR may be inaccurate in the elderly and there is need for improvement. Serum Cystatin C, not being influenced by muscle volume, may be more accurate. Material and methods: GFR was measured with plasma clearance of iohexol in 50 elderly persons aged >70 years. Blood tests were drawn for analysis of creatinine, albumin and urea. Cystatin C was analyse
