Correlation between Head Circumference and Cognition in the Elderly by ApoE Genotype / 신경정신의학

OBJECTIVES: The aim of this study is to find out the effect of ApoE genotype on correlation between head circumference and cognition of the elderly in the community. METHODS: A total of 1,152 subjects (380 men and 772 women) aged 60-91 years were analyzed from preliminary data of GDEMCIS (Gwangju Dementia and MCI Study). The study questionnaire consisted of demographic characteristics, current and past illness history, drug history and K-MMSE (Korean version-Mini Mental State Examination). We also measured the head circumference and examined ApoE genotype. RESULTS: On regression analysis, as head circumference becomes smaller, K-MMSE scores decreased adjusted by age, sex, educational level, ApoE epsilon4 allele, current smoking and alcohol drinking status (beta=0.15, p=0.04). Only in the lowest quartile group, presence of ApoE epsilon4 allele reduced K-MMSE scores adjusted by age, sex, educational level, height, current alcohol drinking and smoking status (beta=-1.39, p=0.008). CONCLUSION: These results suggest that head circumference may have an influence on K-MMSE scores, and presence of ApoE epsilon4 allele may be a medicating factor.

Correlation between Metabolic Syndrome and Cognition in the Elderly / 신경정신의학

OBJECTIVE: The purpose of this study is to find out the effect of ApoE genotype in correlation between metabolic syndrome and cognition of the elderly in the community. METHODS: A total of 1,305 subjects (440 men and 865 women) aged 60-98 years were analyzed from preliminary data of Gwangju Dementia and MCI Study (GDEMCIS). The metabolic syndrome was assessed as defined by the modified National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III). The study questionnaire consisted of demographic characteristics, current and past illness history, drug history, family history of dementia and stroke, and Korean version-Mini Mental State Examination (K-MMSE). We also examined ApoE genotype and analyzed associated factors with metabolic syndrome. RESULTS: These Metabolic syndrome was present in 28.6% of the subjects (13.4% of men and 36.3% of women). On multiple logistic regression analysis, low serum HDL cholesterol was associated with an increased risk for cognitive impairment (K-MMSE score < or = 17) adjusted by age, sex, educational level, and smoking in the presence of ApoE epsilon4 allele (OR 0.95, 95% CI 0.92-0.99). CONCLUSION: These results suggest that serum HDL cholesterol may affect cognitive function in the elderly in the presence of ApoE epsilon4 allele.

Genetic and Neuropsychological Factor Analysis on the Cognitive Function of the Elderly Population: APOE Genotype and Age Effect Analysis / 대한임상병리학회지

BACKGROUND: APOE (Apolipoprotein E) has been known as a risk factor for Alzheimer disease. Studies have demonstrated that different APOE E4 phenotypes appear to modulate the effects of cognitive aging in healthy elderly Caucasian populations. APOE E4 allele has different odds ratio risk for Alzheimer disease according to the age of the subject. Previously, we reported the APOE genotype effect on the cognitive function of the elderly populations without dementia. At this time we studied on the APOE E4 genotype combined with age. METHODS: We examined the different effects of APOE E4 allele on the neuropsychological func-tions of 201 community-dwelling Korean elderly individuals without dementia according age. We used the multivariate general linear model analyses. We made a model with the education year, APOE E4 presence, age (same or more than 70-year-old vs. less than 70-year-old) and APOE E4 presence combined with the age. RESULTS: APOE E4 allele did not show the significant effect on the neuropsychological test when ages are not considered. When the APOE E4 allele and age is combined, the recency, delayed recall and cued recall of the Elderly Verbal Learning Test (EVLT) shows a significant result from the multivariate general linear model anlayses. CONCLUSIONS: APOE E4 allele has a different effect on the cognitive function of the elderly popula-tion according to the age.