Dietary Intake Patterns Are Consistent Across Seasons in a Cohort of Healthy Adults in a Metropolitan Population - 22/12/15
, Marcelo J. Amar, MD, Carolina Arango, MS, RD, Rachel C. Kelley, MS, RD, Susan G. Miszewski, PhD, RD, Samantha Tryon, MA, MS, RD, Amber B. Courville, PhD, RDAbstract |
Background |
Current literature provides conflicting data regarding seasonal variability in dietary intake.
Objective |
Our aim was to examine seasonal variation in dietary intake in healthy adults from the metropolitan Washington, DC, area.
Design |
This study utilized an observational cohort design.
Participants/setting |
Male and female healthy volunteers (n=103) between the ages of 18 and 75 years were recruited from the metropolitan Washington, DC, area to participate in a clinical study at the National Institutes of Health Clinical Center from February 2011 to June 2014.
Main outcome measures |
Three- to seven-day food records were collected from subjects (n=76) at three time points (12 to 15 weeks apart). Subjects were excluded from analysis (n=27) if they completed less than three time points. Food records were reviewed by nutrition staff, assigned to a season, and coded in Nutrient Data System for Research for energy, macronutrient, micronutrient, and food-group serving analysis.
Statistical analyses |
Multivariate general linear models were run on energy, macronutrient, micronutrient, and food-group intakes, while being adjusted for age, sex, race, and body mass index (calculated as kg/m2).
Results |
Subjects had a mean±standard deviation body mass index of 25±3.9 and age of 34±12.4 years. Subject demographics were 71.1% white, 9.2% black/African American, 13.2% Asian, and 6.6% unknown race, with 44.7% males and 55.3% females. Mean intake of energy across seasons was 2,214.6±623.4 kcal with 17.3%±4.1%, 33.6%±5.5%, 46.6%±8.0%, and 2.7%±3.2% of calories from protein, fat, carbohydrate, and alcohol, respectively. Intakes of energy, macronutrients, micronutrients, and food groups did not differ between seasons.
Conclusions |
People living in the metropolitan Washington, DC, area did not exhibit seasonal variation in dietary intake. Therefore, when designing studies of nutrient intake in a metropolitan population, these findings suggest that investigators do not need to consider the season during which diet is examined.
Le texte complet de cet article est disponible en PDF.Keywords : Seasonal variation in dietary intake, Healthy adults, Macronutrients, Micronutrients, Food groups
Plan
| STATEMENT OF POTENTIAL CONFLICT OF INTEREST No potential conflict of interest was reported by the authors. |
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| FUNDING/SUPPORT This study was funded by the National Institutes of Health Intramural Research Program. |
Vol 116 - N° 1
P. 38-45 - janvier 2016 Retour au numéro
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