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Antidepressant use and mortality in very old people
- Gustaf Boström, Carl Hörnsten, Jon Brännström, Mia Conradsson, Peter Nordström, Per Allard, Yngve Gustafson, Håkan Littbrand
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- Journal:
- International Psychogeriatrics / Volume 28 / Issue 7 / July 2016
- Published online by Cambridge University Press:
- 18 March 2016, pp. 1201-1210
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Background:
Antidepressant treatment may increase the risk of death. The association between antidepressants and mortality has been evaluated in community-dwelling older people, but not in representative samples of very old people, among whom dementia, multimorbidity, and disability are common.
Methods:Umeå 85+/GERDA study participants (n = 992) aged 85, 90, and ≥95 years were followed for up to five years. Cox proportional hazard regression models were used to analyze mortality risk associated with baseline antidepressant treatment, adjusted for potential confounders.
Results:Mean age was 89 years; 27% of participants had dementia, 20% had stroke histories, 29% had heart failure, and 16% used antidepressants. In age- and sex-adjusted analyses, antidepressant use was associated with a 76% increased mortality risk (hazard ratio [HR] = 1.76; 95% confidence interval [CI], 1.41–2.19). Adding adjustment for Geriatric Depression Scale score, HR was 1.62 (95% CI, 1.29–2.03). The association was not significant when adjusting for additional confounding factors (HR = 1.08; 95% CI, 0.85–1.38). Interaction analyses in the fully adjusted model revealed a significant interaction between sex and antidepressant use (HR: 1.76; 95% CI, 1.05–2.94). Among male and female antidepressant users, the HRs for death were 0.76 (95% CI, 0.47–1.24) and 1.28 (95% CI, 0.97–1.70), respectively.
Conclusion:Among very old people, baseline antidepressant treatment does not seem to be independently associated with increased mortality risk. However, the risk may be different in men and women. This difference and the potential risk of initial treatment require further investigation in future cohort studies of very old people.
Risk factors for incident dementia in the very old
- Karin Wallin, Gustaf Boström, Miia Kivipelto, Yngve Gustafson
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- Journal:
- International Psychogeriatrics / Volume 25 / Issue 7 / July 2013
- Published online by Cambridge University Press:
- 11 April 2013, pp. 1135-1143
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Background: Several risk factors for dementia, Alzheimer's disease, and cognitive impairment have been established; however, knowledge about risk factors in the very old population (≥85 years) is limited. This study describes the association of several baseline factors with dementia in participants aged ≥85 years, and investigates factors associated with a higher risk of incident dementia over five years.
Methods: The participants in this population-based cohort study were aged 85, 90, and ≥95 years at baseline (2000–2002). Data were collected during home visits for interviews and testing, from a review of medical records, and/or interviewing the caregiver or next of kin. After five years 212 participants could be followed up concerning incident dementia. Multivariate logistic regression was used.
Results: At baseline, 100/353 (28%) of participants had a dementia diagnosis. Over five years, 71/212 (33.5%) participants developed dementia. Few participants with dementia at baseline remained alive after five years (12%). Depression at the baseline and follow-up time were associated with a higher risk of dementia, odds ratio (OR) (95% CI, p-value) 2.91 (1.37–6.16, 0.005) and 1.61 (1.26–2.05, <0.001) respectively. More social contact and a higher Mini-Mental State Examination score at baseline were associated with lower risk of incident dementia, OR (95% CI, p-value) 0.87 (0.78–0.97, 0.009) and 0.83 (0.74–0.93, 0.001) respectively.
Conclusions: Prevalence and incidence of dementia are high in very old people and dementia appears to be a fatal disorder. Depression is associated with higher risk of incident dementia over five years whereas more frequent social contacts and a higher MMSE score are associated with lower risk.