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Fat intake at midlife and cognitive impairment later in life: a population‐based CAIDE study
Author(s) -
Eskelinen Marjo H.,
Ngandu Tiia,
Helkala EevaLiisa,
Tuomilehto Jaakko,
Nissinen Aulikki,
Soininen Hilkka,
Kivipelto Miia
Publication year - 2008
Publication title -
international journal of geriatric psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 129
eISSN - 1099-1166
pISSN - 0885-6230
DOI - 10.1002/gps.1969
Subject(s) - psychomotor learning , cognition , population , effects of sleep deprivation on cognitive performance , cognitive decline , psychology , gerontology , semantic memory , episodic memory , polyunsaturated fatty acid , dementia , medicine , psychiatry , environmental health , biology , biochemistry , fatty acid , disease
Objective To investigate the association of midlife dietary fat intake to cognitive performance, and to the occurrence of clinical mild cognitive impairment (MCI) later in life in a non‐demented population. Design A longitudinal population‐based study. Setting Populations of Kuopio and Joensuu, Eastern Finland. Participants and methods Participants of the CAIDE study were derived from random, population‐based samples studied at midlife (1972, 1977, 1982 or 1987). After an average follow‐up of 21 years, a total of 1449 (72%) individuals aged 65–80 years participated in the re‐examination in 1998. Altogether 82 (5.7%) people were diagnosed as having MCI. Dietary information was collected with a structured questionnaire and an interview at midlife. Main outcome measures MCI, global cognitive and executive functions, episodic, semantic and prospective memory and psychomotor speed. Results Abundant saturated fat (SFA) intake from milk products and spreads at midlife was associated with poorer global cognitive function and prospective memory and with an increased risk of MCI (OR 2.36, 95% CI 1.17–4.74) after adjusting for demographic and vascular factors, other fats and ApoE. On the contrary, high intake of polyunsaturated fatty acids (PUFA) was associated with better semantic memory. Also frequent fish consumption was associated with better global cognitive function and semantic memory. Further, higher PUFA–SFA ratio was associated with better psychomotor speed and executive function. Conclusions Our data suggests that dietary fat intake at midlife affects cognitive performance and occurrence of MCI later in life. The impact of dietary interventions needs to be tested in clinical trials. Copyright © 2008 John Wiley & Sons, Ltd.