TY - JOUR
T1 - Several factors influenced attrition in a population-based elderly cohort
T2 - Neurological disorders in Central Spain Study
AU - Vega, Saturio
AU - Benito-León, Julián
AU - Bermejo-Pareja, Félix
AU - Medrano, María José
AU - Vega-Valderrama, Luisa M.
AU - Rodríguez, Cilia
AU - Louis, Elan D.
N1 - Funding Information:
Role of the funding source : The NEDICES was supported by the Spanish Health Research Agency (FIS 93/0773 and 96/1993), SACYL grant, and the Spanish Office of Science and Technology. Dr. Louis is supported by NIH R01 NS042859 and R01 NS039422 from the National Institutes of Health, Bethesda, MD, USA.
PY - 2010/2
Y1 - 2010/2
N2 - Objective: We studied attrition (i.e., participant dropout) 3 years after the baseline interview in a population-based Spanish cohort. Study Design and Setting: The Neurological Disorders in Central Spain study is a longitudinal, population-based survey of chronic neurologic conditions in persons aged ≥65 years. Multivariate logistic regression analysis was used to examine baseline differences between participants who took part in the 3-year follow-up evaluation vs. those who did not. Results: Of the 5,278 participants evaluated at baseline (1994-1995), 1,482 (28.1%) were lost to the follow-up (1997-1998). Factors that were associated with dropout due to refusal were as follows: living in a rural area and being single. Contact failure was associated with older age and being unmarried and widowed. Unreachable participants were less likely to take three or more medications or live in a professional neighborhood. Predictors of dropout due to death were male gender, older age, having impaired activities of daily living, taking more medications, poor self-perceived health, dementia, and smoking. Conclusions: These findings on participants who are at high risk of dropout may be useful in the planning phase of future prospective studies. Of the possible reasons for attrition, refusal is the most important because it is amenable to change. Crown
AB - Objective: We studied attrition (i.e., participant dropout) 3 years after the baseline interview in a population-based Spanish cohort. Study Design and Setting: The Neurological Disorders in Central Spain study is a longitudinal, population-based survey of chronic neurologic conditions in persons aged ≥65 years. Multivariate logistic regression analysis was used to examine baseline differences between participants who took part in the 3-year follow-up evaluation vs. those who did not. Results: Of the 5,278 participants evaluated at baseline (1994-1995), 1,482 (28.1%) were lost to the follow-up (1997-1998). Factors that were associated with dropout due to refusal were as follows: living in a rural area and being single. Contact failure was associated with older age and being unmarried and widowed. Unreachable participants were less likely to take three or more medications or live in a professional neighborhood. Predictors of dropout due to death were male gender, older age, having impaired activities of daily living, taking more medications, poor self-perceived health, dementia, and smoking. Conclusions: These findings on participants who are at high risk of dropout may be useful in the planning phase of future prospective studies. Of the possible reasons for attrition, refusal is the most important because it is amenable to change. Crown
KW - Attrition
KW - Cohort maintenance
KW - Cohort study
KW - Elderly
KW - Follow-up study
KW - Population-based study
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U2 - 10.1016/j.jclinepi.2009.03.005
DO - 10.1016/j.jclinepi.2009.03.005
M3 - Article
C2 - 19473811
AN - SCOPUS:73049106299
SN - 0895-4356
VL - 63
SP - 215
EP - 222
JO - Journal of Clinical Epidemiology
JF - Journal of Clinical Epidemiology
IS - 2
ER -