Attrition and bias in the MRC cognitive function and ageing study: an epidemiological investigation

• Main Authors: Matthews Fiona E (Author), Chatfield Mark (Author), Freeman Carol (Author), McCracken Cherie (Author), Brayne Carol (Author), CFAS MRC (Author)
• Format: Book
• Published: BMC, 2004-04-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

<p>Abstract</p> <p>Background</p> <p>Any hypothesis in longitudinal studies may be affected by attrition and poor response rates. The MRC Cognitive Function and Ageing study (MRC CFAS) is a population based longitudinal study in five centres with identical methodology i...