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Original

Community study of dementia in the older Korean rural population

, &
Pages 606-612 | Received 14 Nov 2002, Accepted 23 Jun 2003, Published online: 07 Aug 2009
 

Abstract

Objective: This study aims to estimate the prevalence of all dementias, including Alzheimer's disease (AD) and vascular dementia (VaD) in a population of Korean elderly and to identify possible risk factors which correlated with specific types of dementia.

Method: A two-phase survey, based on a door-to-door survey, was conducted. Initially, the Korean version of the Psychogeriatric Assessment Scale (PAS-K) was administered to all 1037 participants aged 65 years and older. Three hundred and seventy people sampled from the case groups (n = 320) of PAS-K subscales and the non-case group (n = 50) entered the second phase for clinical evaluation. Dementia was defined using the DSM-III-R, NINCDSADRDA and NINDS-AIREN criteria.

Results: Among 1037 elderly people aged 65–94 years who completed the interview, 74 cases of dementia were detected, giving an overall age-standardized prevalence (95% CI) of 6.8% (6.1–7.5) (male 6.3%[5.3–7.4]; female 7.1% [6.1–8.0]). The prevalence (95% CI) of AD was 4.2% (3.6–4.7) (male 2.4% [2.0–2.8]; female 5.3% [4.5–6.1]), and it increased with age. The prevalence (95% CI) of VaD was 2.4% (2.0–2.8) (male 3.5% [2.7–4.3]; female 1.6% [1.2–2.1]). Smoking for longer than 30 pack-years significantly increased the risk of VaD (OR = 11.5 [2.8–44,6]).

Conclusion: Long-term smoking, much more prevalent in men, may be closely related to higher risk of cerebrovascular disease that leads to vascular dementia.

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