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Br J Nutr. 2016 Jun;115(12):2145-53. doi: 10.1017/S0007114516001318. Epub 2016 Apr 15.

The association between dietary patterns derived by reduced rank regression and depressive symptoms over time: the Invecchiare in Chianti (InCHIANTI) study.

Author information

1
1Department of Public Health,Academic Medical Centre,University of Amsterdam,1105 AZ Amsterdam,The Netherlands.
2
2Department of Health Sciences, EMGO Institute,VU University Amsterdam,1081 HV Amsterdam,The Netherlands.
3
4Program for Mood Disorders,Department of Psychiatry,Academic Medical Centre,University of Amsterdam,1105 AZ Amsterdam,The Netherlands.
4
7InCHIANTI Study Group,Azienda Sanitaria Firenze,50125 Florence,Italy.
5
8Longitudinal Studies Section,National Institute on Aging,Baltimore,MD 21224,USA.

Abstract

This study aimed to identify dietary patterns using reduced rank regression (RRR) and to explore their associations with depressive symptoms over 9 years in the Invecchiare in Chianti study. At baseline, 1362 participants (55·4 % women) aged 18-102 years (mean age 68 (sd 15·5) years) were included in the study. Baseline data collection started in 1998 and was repeated after 3, 6 and 9 years. Dietary intake information was obtained using a country-specific, validated FFQ with 188 food items. For baseline diet, dietary pattern scores in quartiles (Q) were derived using RRR with the nutrients EPA+DHA, folate, Mg and Zn as response variables. Continuous depression scores from the Centre for Epidemiologic Studies Depression (CES-D) scale were used for assessing depressive symptoms. The derived dietary pattern was rich in vegetables, olive oil, grains, fruit, fish and moderate in wine and red and processed meat, and was labelled as 'typical Tuscan dietary pattern'. After full adjustment, an inverse association was observed between this dietary pattern and depressive symptoms at baseline (Q1 v. Q4, B -2·77; 95 % CI -4·55, -0·98). When examining the relationship between the above-mentioned dietary pattern at baseline and depressive symptoms over 9 years, a similar association was found after full adjustment for confounding factors (Q1 v. Q4, B -1·78; 95 % CI -3·17, -0·38). A diet rich in vegetables, olive oil, grains, fruits, fish and moderate in wine and red and processed meat was consistently associated with lower CES-D scores over a 9-year period in the Tuscan population.

KEYWORDS:

CES-D Centre for Epidemiologic Studies Depression; Depressive symptoms; Diet; Dietary patterns; IADL instrumental activities of daily living scale; InCHIANTI Invecchiare in Chianti; Invecchiare in Chianti study; Q quartile; RRR reduced rank regression; Reduced rank regression

PMID:
27080555
PMCID:
PMC6132244
DOI:
10.1017/S0007114516001318
[Indexed for MEDLINE]
Free PMC Article

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