Validity of Short and Long Self-Administered Food Frequency Questionnaires in Ranking Dietary Intake in Middle-Aged and Elderly Japanese in the Japan Public Health Center-Based Prospective Study for the Next Generation (JPHC-NEXT) Protocol Area

et al. 2016

Tohoku J. Exp. Med.

Health benefits of fermented foods are attracting attention worldwide, and they have been traditionally eaten in Japan. Moreover, a recent study showed the association between the higher intake of yogurt and lower prevalence of depressive symptoms during pregnancy. Psychological problems, such as anxiety and depression, during pregnancy are serious health concerns and may increase the risk of adverse outcomes in children. In this study, we explored the association between fermented food consumption and psychological distress in 10,129 pregnant Japanese women, using the fixed data of the Japan Environment and Children's Study (JECS), an ongoing nation-wide birth cohort study. Food consumption was assessed with a semi-quantitative food frequency questionnaire (FFQ), and the Kessler 6-item psychological distress scale (K6) was administered to eligible women during their second or third trimester to eliminate overlap with the period of hyperemesis gravidarum. The mean median gestation in the subjects was 24.8 weeks. In total, 9,030 subjects completed the K6 questionnaire and FFQ. Importantly, the prevalence of the K6 score of ≥ 13 was 3.1% (280 subjects). This value was lower compared to precedent studies, which may reflect that cooperative and health conscious subject participated in the survey. The multivariate logistic regression analysis indicates that the intake of yogurt, lactic acid beverages, cheese, Japanese pickles, miso soup, or fermented soybeans was not significantly associated with a K6 score of ≥ 13. In conclusion,

Section: Exposuresmentioning

confidence: 99%

Fermented Food Consumption and Psychological Distress in Pregnant Women: A Nationwide Birth Cohort Study of the Japan Environment and Children’s Study

Takahashi

et al. 2016

Tohoku J. Exp. Med.

“…Details of the study design and participant characteristics have been described previously [14]. Validation studies of the FFQ were conducted in five areas (Yokote, Saku, Chikusei, Murakami, and Uonuma) according to the protocol of the Japan Public Health Center-based Prospective Study for the Next Generation (JPHC-NEXT) between November 2012 and December 2013 [14]. FFQs were administered twice, with an interval of 1 year.…”

Section: Data Collection and Study Participantsmentioning

confidence: 99%

“…FFQs were administered twice, with an interval of 1 year. DR reference intake data were obtained from all participants using a consecutive 3-day weighed food record (which included a weekend) at 3-month intervals across all seasons (winter, spring, summer, autumn) [14]. A group of 253 participants completed the 12-day DRs and FFQs.…”

Section: Data Collection and Study Participantsmentioning

confidence: 99%

Variations in the estimated intake of acrylamide from food in the Japanese population

Kito

Ishihara

Yamamoto

et al. 2020

Nutr J

Self Cite

Background: Due to concerns of carcinogenicity, it is necessary to assess long-term acrylamide exposure in individuals. Whether the available methods of estimating acrylamide intake can indicate long-term exposure remains unknown. We examined variations in the estimated dietary acrylamide intake of the Japanese population. Methods: The study included 240 participants aged 40-74 years who were a part of the Japan Public Health Center-based Prospective Study for the Next Generation (JPHC-NEXT). Twelve-day dietary records (DRs) were collected over a one-year period, and food frequency questionnaires (FFQs) were collected twice during the year. Dietary acrylamide intake was estimated from an acrylamide content database. Within-individual variations and between-individual variations were calculated using the random effects model. A linear regression analysis was performed to identify foods with large between-individual variations. Results: The ratios of within-individual variance to between-individual variation were 3.2 for men and 4.3 for women. Days of DRs required to estimate the usual individual intake within 20% of the true mean intake with 95% confidence were 60 days for men and 66 days for women. Coffee/cocoa, potato, and green tea contributed to between-individual variations, in that order, and seven foods contributed to 93% of the between-individual variation. Conclusions: Estimating the acrylamide intake using DRs requires an extended data collection period to estimate the intragroup ranking and habitual intake of individuals. Long-term exposure assessments should be based on methods with less potential for measurement errors, such as the use of biomarkers.

“…The FFQ comprised a list of foods with standard portion sizes commonly consumed in Japan. 10 Participants were asked to report the daily, weekly, or monthly frequencies of their consumption of foods over the previous…”

Section: Introductionmentioning

confidence: 99%

“…The validity of the FFQ for estimating folic acid intake has been evaluated previously. 10 The Ministry of Health, Labour and Welfare in Japan (2015) 11 has recommended the intake of more than 480 μg/day of dietary folic acid and 400 μg/day of supplementary folic acid for women who are planning to get pregnant. Therefore, the study participants were classified into two groups (<480 μg and ≥480 μg).…”

Section: Introductionmentioning

confidence: 99%

Preconception folic acid supplementation use and the occurrence of neural tube defects in Japan: A nationwide birth cohort study of the Japan Environment and Children's Study

Obara

et al. 2018

Congenital Anomalies

We evaluated the relationship between preconception folic acid supplementation and the occurrence of neural tube defects (NTDs) in offspring, using data from the Japan Environment and Children's Study (a nationwide prospective birth cohort study) database. Of 92 269 participants with single pregnancies, 74 cases (offspring or fetuses) had NTDs, including 32 cases of spina bifida, 24 cases of anencephaly, and 19 cases of encephalocele. A total of 7634 participants (8.27%) used preconception folic acid supplementation, and of these, 621 (0.67%) also took in dietary folic acid at ≥480 μg/day. Multivariate logistic regression analyses demonstrated no association between preconception folic acid supplementation and NTDs in offspring or fetuses (odds ratio [OR] 0.622; 95% confidence interval [CI]: 0.226-1.713). Moreover, the participants who combined preconception folic acid supplement use with dietary folic acid intake ≥480 μg/day demonstrated no incidence of NTDs in offspring or fetuses. Our analysis is limited by the absence of the data on the daily amount of supplementary folic acid intake, requiring careful attention to the interpretation. Additional surveys are required in Japan to resolve those limitations for further comprehensive assessment.