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Survival in a population-based cohort of dementia patients: predictors and causes of mortality
F Boersma1, W Van Den Brink, D J Deeg
1Nursing Home 'Anna Schotanus', Heerenveen, The Netherlands.
Objectives:
To examine predictors of survival time and causes of mortality in a population-based cohort of demented subjects.
Design:
Longitudinal naturalistic follow-up study.
Setting:
A rural area in The Netherlands.
Participants:
The study population consisted of 102 demented subjects derived from a population-based, two-stage prevalence study of dementia among subjects aged 65 and over.
Measurements And Analysis:
Survival analysis was performed using the Realized Probability of Dying as a measure of survival time. Adjustment for duration and severity at study entry was employed in all analyses.
Results:
A substantial excess mortality was present among demented subjects as compared with their non-demented birth cohort. Disorders related to dementia, such as cachexia, dehydration and pneumonia, were major causes of death. Variables related to severity of functional impairment, aphasia and a shorter duration at study entry predicted a shorter survival in the study population.
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