The within-subject variation of CEA is about 9 - 15% from a series of small studies. A good source of this data is Arch Pathol Lab Med 1992;116:916 by Callum Fraser, and I believe there has been an update since then (same journal). Peter Bunting Brampton, Ontario, Canada -----Original Message----- From: Jonathan Kay [mailto:[log in to unmask]] Sent: Tuesday, May 28, 2002 11:21 AM To: [log in to unmask] Subject: Variation of CEA Can anyone tell me the biological variation of serum CEA concentration? Or where to try and find the information? Dr Jonathan Kay ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/ ------ACB discussion List Information-------- This is an open discussion list for the academic and clinical community working in clinical biochemistry. Please note, archived messages are public and can be viewed via the internet. Views expressed are those of the individual and they are responsible for all message content. ACB Web Site http://www.acb.org.uk List Archives http://www.jiscmail.ac.uk/lists/ACB-CLIN-CHEM-GEN.html List Instructions (How to leave etc.) http://www.jiscmail.ac.uk/