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Title: Predictors of attrition in a longitudinal cognitive aging study: the Maastricht Aging Study (MAAS)
Authors: Van Beijsterveldt, C E M ×
van Boxtel, M P J
Bosma, H
Houx, P J
Buntinx, Frank
Jolles, J #
Issue Date: Mar-2002
Series Title: Journal of clinical epidemiology vol:55 issue:3 pages:216-23
Abstract: A large sample of older participants of the Maastricht Aging Study (MAAS) were compared to drop-outs at the 3-year follow-up with respect to socio-demographic, health, and cognitive characteristics. In addition, the impact of selective drop-out on measures of cognitive change was examined. To this end, hypothetical scores were estimated for drop-outs by using single and multiple imputation methods. Of the initial sample of 539 subjects, aged 49 years and older at baseline, 116 (22 %) did not return for the follow-up (n = 32 had died, n = 84 refused participation). Drop-outs who refused to participate in the follow-up were more often women, had lower educational levels, and had lower baseline scores on neurocognitive tests. Follow-up drop-outs who had died were more often men, older, and had a poorer performance on cognitive tests than the follow-up participants. Although follow-up participants and drop-outs differed in terms of socio-demographic and cognitive characteristics, attrition appeared to have little effect on the estimates of cognitive change.
URI: 
ISSN: 0895-4356
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Academic Center for General Practice
× corresponding author
# (joint) last author

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