• Akiko Nanri, Nana Miyaji, Takeshi Kochi, Masafumi Eguchi, Isamu Kabe, and Tetsuya Mizoue.
• Department of Food and Health Sciences, International College of Arts and Sciences, Fukuoka Women's University, Fukuoka, Japan; Department of Epidemiology and Prevention, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan. Electronic address: nanri@fwu.ac.jp.
• Nutrition. 2020 Oct 1; 78: 110962.

ObjectivesEvidence from prospective studies on the association between eating speed and metabolic syndrome is limited. We prospectively investigated the association between eating speed and metabolic syndrome in a Japanese working population.MethodsParticipants were 1018 workers (ages 19-68 y) without metabolic syndrome at baseline who completed both baseline and 3-y follow-up surveys. Eating speed was self-reported and categorized as slow, medium, or fast. Metabolic syndrome was defined using criteria recommended in a joint interim statement from several international societies. A multiple logistic regression was used to estimate the odds ratio of metabolic syndrome according to eating speed with adjustment for covariates, including total energy intake.ResultsAt the 3-y follow-up, 67 workers (6.6%) were newly identified as having metabolic syndrome. Fast eating speed was significantly associated with increased odds of developing metabolic syndrome, with multivariable-adjusted odds ratios for eating fast of 2.13 (95% confidence intervals, 1.23-3.68) compared with medium eating speed with an adjustment for covariates, including total energy intake. The association remained statistically significant after an additional adjustment for body mass index (BMI) and BMI change between baseline and follow-up surveys (odds ratio: 1.95; 95% confidence interval, 1.06-3.56).ConclusionsFast eating speed was associated with an increased likelihood of developing metabolic syndrome independently of total energy intake, BMI at baseline, and BMI change during the follow-up period.Copyright © 2020 Elsevier Inc. All rights reserved.

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