Alcohol drinking in middle age and subsequent risk of mild cognitive impairment and dementia in old age: a prospective population based studyBMJ 2004; 329 doi: https://doi.org/10.1136/bmj.38181.418958.BE (Published 02 September 2004) Cite this as: BMJ 2004;329:539
- Tiia Anttila, PhD student1,
- Eeva-Liisa Helkala, neuropsychologist2,
- Matti Viitanen, professor3,
- Ingemar Kåreholt, statistician1,
- Laura Fratiglioni, professor1,
- Bengt Winblad, professor3,
- Hilkka Soininen, professor4,
- Jaakko Tuomilehto, professor5,
- Aulikki Nissinen, professor5,
- Miia Kivipelto, researcher ()1
- 1 Aging Research Center, Division of Geriatric Epidemiology, Neurotec, Karolinska Institutet, Box 6401, 11382 Stockholm, Sweden
- 2 Department of Public Health and General Practice, University of Kuopio, Box 1627, 70211 Kuopio, Finland
- 3 Division of Geriatric Medicine, Neurotec, Karolinska Institutet, Karolinska University Hospital, Huddinge, 14186 Stockholm
- 4 Department of Neuroscience and Neurology, University of Kuopio, Kuopio
- 5 Department of Epidemiology and Health Promotion, National Public Health Institute, Mannerheimintie 166, 00300 Helsinki, Finland
- Correspondence to: Miia Kivipelto
- Accepted 6 July 2004
Objective To evaluate the relation between midlife alcohol consumption and mild cognitive impairment and dementia in old age, and the possible modification of this relation by apolipoprotein E.
Design Prospective, population based study.
Setting Populations of Kuopio and Joensuu, eastern Finland.
Participants Of 1464 men and women aged 65-79 years randomly selected from population based samples studied in 1972 or 1977, 1018 (70%) were re-examined in 1998 (after an average follow up of 23 years).
Main outcome measures Mild cognitive impairment and dementia in old age.
Results Participants who drank no alcohol at midlife and those who drank alcohol frequently were both twice as likely to have mild cognitive impairment in old age as those participants who drank alcohol infrequently. The risk of dementia related to alcohol drinking was modified by the presence of the apolipoprotein e4 allele. The carriers of apolipoprotein e4 had an increased risk of dementia with increasing alcohol consumption: compared with non-carriers who never drank, the odds ratio for carriers who never drank was 0.6, for infrequent drinkers it was 2.3, and for frequent drinkers was 3.6 (the overall interaction term “drinking frequency*apolipoprotein e4” was significant (P = 0.04), as were the interactions “infrequent drinking*apolipoprotein e4” (P = 0.02) and “frequent drinking*apolipoprotein e4” (P = 0.03)). Non-carriers of apolipoprotein e4 had similar odds ratios for dementia irrespective of alcohol consumption.
Conclusion Alcohol drinking in middle age showed a U shaped relation with risk of mild cognitive impairment in old age. Risk of dementia increased with increasing alcohol consumption only in those individuals carrying the apolipoprotein e4 allele.
We thank the colleagues in the CAIDE study group for their cooperation in data collection and management.
Contributors MK and E-LH were the principal investigators in diagnosing dementia. TA analysed the data and drafted the paper. MK assisted in analyses and writing. MK, E-LH, AN, JT, and HS contributed to the conception and design of the study, JT and AN were involved in the baseline surveys for the study. TA, E-LH, MV, IK, LF, BW, HS, JT, AN and MK took part in planning the study and interpreting the data and commented on the manuscript. MK is the guarantor.
Funding Supported by the Aging Program of the Academy of Finland, EVO-grants of Kuopio University Hospital (5772708, 5772720) and Academy of Finland grants 103334 and 206951, SADF (Insamligsstiftelsen för Alzheimeroch Demensforskning), and the Gamla Tjänarinnor Foundation.
Competing interests None declared.
Ethical approval The ethics committees of the University of Kuopio and the Kuopio University Hospital, Kuopio, Finland, approved the study protocol.