Coffee, tea and caffeine intake and the risk of severe depression in middle-aged Finnish men: the Kuopio Ischaemic Heart Disease Risk Factor Study.
OBJECTIVE
Only a few cross-sectional studies have assessed the association between coffee, tea and caffeine and the risk of depression. Our aim was to determine the association in a population-based cohort study.


METHODS
The population-based Kuopio Ischaemic Heart Disease Risk Factor Study cohort was recruited between 1984 and 1989 and followed until the end of 2006. We investigated the association between the intake of coffee, tea and caffeine and depression.


METHODS
Eastern Finland.


METHODS
Middle-aged men (n 2232).


RESULTS
Altogether, forty-nine men received a discharge diagnosis of depression. We classified subjects into quartiles according to their mean daily coffee intake: non-drinkers (n 82), light drinkers (<375 ml/d, n 517), moderate drinkers (375-813 ml/d, n 1243) and heavy drinkers (>813 ml/d, n 390). Heavy drinkers had a decreased risk (RR = 0.28, 95 % CI 0.08, 0.98) for depression when compared with non-drinkers, after adjustment for age and examination years. Further adjustment for socio-economic status, alcohol consumption, smoking, maximal oxygen uptake, BMI and the energy-adjusted daily intakes of folate and PUFA did not attenuate this association (relative risk (RR) = 0.23, 95 % CI 0.06, 0.83). No associations were observed between depression and intake of tea (drinkers v. non-drinkers; RR = 1.19, 95 % CI 0.54, 2.23) or caffeine (highest quartile v. lowest quartile; RR = 0.99, 95 % CI 0.40, 2.45).


CONCLUSIONS
Coffee consumption may decrease the risk of depression, whereas no association was found for tea and caffeine intake.
Ruusunen
Anu
A
Institute of Public Health and Clinical Nutrition, Kuopio Campus, University of Eastern Finland, 70211 Kuopio, Finland. anu.ruusunen@uku.fi
Lehto
Soili M
SM
Tolmunen
Tommi
T
Mursu
Jaakko
J
Kaplan
George A
GA
Voutilainen
Sari
S
D000328:Adult; D002110:Caffeine / Q000627:therapeutic use; D028241:Camellia sinensis; D003069:Coffee / Q000737:chemistry; D015331:Cohort Studies; D003866:Depressive Disorder / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control*; D005387:Finland / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008517:Phytotherapy; D010936:Plant Extracts / Q000627:therapeutic use*; D012307:Risk Factors; D013662:Tea
D003069:Coffee; D010936:Plant Extracts; D013662:Tea; D002110:Caffeine