TY - JOUR
T1 - Predictors of attrition in a longitudinal cognitive aging study: Results from the Maastricht Aging Study (MAAS).
AU - van Beijsterveldt, C.E.M.
AU - van Boxtel, M.P.J.
AU - Bosma, J.H.A.
AU - Houx, P.J.
AU - Buntinx, F.J.V.M.
AU - Jolles, J.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - 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 measure, 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 participant, 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.
AB - 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 measure, 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 participant, 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.
U2 - 10.1016/S0895-4356(01)00473-5
DO - 10.1016/S0895-4356(01)00473-5
M3 - Article
SN - 0895-4356
VL - 55
SP - 216
EP - 223
JO - Journal of Clinical Epidemiology
JF - Journal of Clinical Epidemiology
IS - 3
ER -