Adherence to Healthy Prepregnancy Lifestyle and Risk of Adverse Pregnancy Outcomes: A Prospective Cohort Study.

Objective: To quantify the association between a combination of modifiable prepregnancy lifestyle factors and the risk of adverse pregnancy outcomes (APOs).

Design: Prospective cohort study.

Setting: The Japan Environment and Children's Study.

Association Between Periconceptional Diet Quality and Hypertensive Disorders of Pregnancy: The Japan Environment and Children's Study.

Background: Little is known about the relationship of healthy diets, which are widely recommended to prevent diseases in general populations, with the risk of hypertensive disorders of pregnancy (HDP), particular among non-Western populations with different dietary habits. We aimed to investigate the association between periconceptional diet quality and the risk of HDP among pregnant Japanese women.

Methods And Results: Dietary intake over 1 year before the first trimester of pregnancy was assessed using a validated, self-administered food frequency questionnaire among 81 113 pregnant Japanese women who participated in a prospective cohort of the Japan Environment and Children's Study.

Maternal fat intake in pregnancy and risk of depressive symptoms in Japanese adolescents: the Kyushu Okinawa Maternal and Child Health Study.

The current prebirth cohort study investigated the association between maternal intake of specific types of fatty acids during pregnancy and adolescent depressive symptoms based on the Center for Epidemiologic Studies Depression Scale. Subjects were 873 mother-child pairs. Dietary intake during the preceding month was assessed using a self-administered diet history questionnaire.

Nut consumption during pregnancy is associated with decreased risk of peer problems in 5-year-old Japanese children.

Objectives: Nuts are nutrient-dense foods rich in unsaturated fatty acids, protein, dietary fiber, vitamins, and minerals. The present prebirth cohort study examined the association between maternal nut intake during pregnancy and the risk of childhood behavioral problems in 5-year-old Japanese children.

Methods: Study subjects were 1199 mother-child pairs.

Coffee and caffeine intake reduces risk of ulcerative colitis: a case-control study in Japan.

Background And Aim: Although diet is one of the potential environmental factors affecting ulcerative colitis (UC), evidence is not sufficient to draw definitive conclusions. This Japanese case-control study examined the association between the consumption of coffee, other caffeine-containing beverages and food, and total caffeine and the risk of UC.

Methods: The study involved 384 UC cases and 665 control subjects.

Relationship between the number of teeth, occlusal force, occlusal contact area, and dietary hardness in older Japanese adults: The SONIC study.

Purpose: Individuals with impaired masticatory function tend to prefer soft foods, which results in decreased masticatory muscle activity. This study examined the association between the oral condition (number of teeth, occlusal force, and occlusal contact area) and dietary hardness using a daily dietary questionnaire.

Methods: This cross-sectional study evaluated 1841 participants aged 69-71 and 79-81 years.

Periconceptional diet quality and its relation to blood heavy metal concentrations among pregnant women: The Japan environment and Children's study.

Background: Diets contain toxic chemical contaminants as well as essential nutrients, both of which influence the intrauterine environment for foetal growth. However, whether a high-quality diet that is nutritionally healthy also results in lower exposure to chemical contaminants is unknown.

Objective: We examined associations between periconceptional maternal diet quality and circulating concentrations of heavy metals during pregnancy.

Periconceptional maternal diet quality influences blood heavy metal concentrations and their effect on low birth weight: the Japan Environment and Children's Study.

Background: Both poor maternal nutrition and toxic heavy metal exposure influence foetal growth and development. However, whether consumption of a variety of healthy foods modifies the association between prenatal heavy metal exposure and foetal growth is unknown.

Objective: We examined whether long-term maternal diet quality in periconception modifies the associations between maternal circulating concentrations of heavy metals and foetal growth.

Maternal Consumption of Dairy Products during Pregnancy Is Associated with Decreased Risk of Emotional Problems in 5-Year-Olds: The Kyushu Okinawa Maternal and Child Health Study.

Milk is a good source of fats, minerals, and vitamins. The present prebirth cohort study examined the association between maternal dairy product intake during pregnancy and the risk of childhood behavioral problems in 5-year-old Japanese children. Study subjects were 1199 mother-child pairs.

Tryptophan intake is related to a lower prevalence of depressive symptoms during pregnancy in Japan: baseline data from the Kyushu Okinawa Maternal and Child Health Study.

Objective: Tryptophan is an essential amino acid wholly derived from diet. While the majority of tryptophan is degraded through the kynurenine pathway into neuroactive metabolites like quinolinic acid and kynurenic acid, a small proportion of ingested tryptophan is metabolized into the neurotransmitter serotonin. The current cross-sectional study in Japan examined the association between tryptophan intake and depressive symptoms during pregnancy.

Maternal calcium intake during pregnancy and childhood blood pressure: the Kyushu Okinawa Maternal and Child Health Study.

Purpose: Evidence regarding the relationship between maternal calcium intake during pregnancy and childhood blood pressure is limited and inconsistent. The present prebirth cohort study examined this issue in Japanese children aged 6 years.

Methods: Subjects were 854 mother-child pairs.

Exploring culturally acceptable, nutritious, affordable and low climatic impact diet for Japanese diets: proof of concept of applying a new modelling approach using data envelopment analysis.

A future sustainable dietary pattern for Japanese is yet undefined. This study aimed to explore more sustainable Japanese diets that are nutritious, affordable and with low greenhouse gas emissions (GHGE) and particular emphasis on cultural acceptability. A newly developed data envelopment analysis (DEA) diet model was applied to 4-d dietary record data among 184 healthy Japanese men and 185 women volunteers aged 21-69 years.

Maternal consumption of soy and isoflavones during pregnancy and risk of childhood behavioural problems: the Kyushu Okinawa Maternal and Child Health Study.

It is uncertain whether the effects of prenatal exposure to isoflavones on childhood behaviour are beneficial or detrimental. This prebirth cohort study investigated the associations between maternal consumption of soy products and isoflavones during pregnancy and behavioural problems in Japanese children aged 5 years. Subjects were 1199 mother-child pairs.

Maternal metal intake during pregnancy and childhood behavioral problems in Japan: the Kyushu Okinawa Maternal and Child Health Study.

Objectives: Lower maternal metal intake during pregnancy might affect childhood development. The current prebirth cohort study investigated the relationship between maternal intake of zinc, magnesium, iron, copper, and manganese during pregnancy and behavioral problems in Japanese children aged five years.

Methods: Subjects were 1199 mother-child pairs.

Maternal caffeine intake during pregnancy and risk of food allergy in young Japanese children.

Aim: To examine the association between maternal caffeine intake during pregnancy and the development of food allergy in young Japanese children up to 3 years of age.

Methods: The study involved 1522 mother-child pairs. Data on maternal caffeine intake during pregnancy were assessed with a validated diet history questionnaire.

Calcium intake during pregnancy is associated with decreased risk of emotional and hyperactivity problems in five-year-old Japanese children.

Recently, more attention has been paid to behavioral problems in children. However, for the most part, risk factors for these problems have yet to be determined. The current prebirth cohort study investigated the relationship between maternal calcium consumption during pregnancy and behavioral problems in five-year-old Japanese children.

Maternal consumption of vegetables, fruit, and antioxidants during pregnancy and risk for childhood behavioral problems.

Objective: The aim of this pre-birth cohort study was to examine the associations between maternal intake of vegetables, fruit, and antioxidants during pregnancy and behavioral problems in Japanese children 5 y of age.

Methods: Participants were 1199 mother-child pairs. Dietary intake was assessed using a diet history questionnaire.

Sociodemographic Factors Influenced Response to the 2015 National Nutrition Survey on Preschool Children: Results From Linkage With the Comprehensive Survey of Living Conditions.

Background: The National Nutrition Survey on Preschool Children, Japan (NNSPC) provides fundamental information for policy making for child nutrition. However, the response rate and background characteristics of subjects are unclear. Here, we examined response rate and sociodemographic factors related with response to the survey and evaluated the magnitude of bias due to selective response in the survey estimates of the NNSPC.

The Relationship of Eating Rate and Degree of Chewing to Body Weight Status among Preschool Children in Japan: A Nationwide Cross-Sectional Study.

There is growing recognition that eating slowly is associated with a lower risk of obesity, and chewing well might be an effective way to reduce the eating rate. However, little is known about these relationships among children. We therefore investigated the associations of eating rate and chewing degree with weight status among 4451 Japanese children aged 5⁻6 years.

Maternal B vitamin intake during pregnancy and childhood behavioral problems in Japan: The Kyushu Okinawa Maternal and Child Health Study.

The current prebirth cohort study investigated the relationship between maternal B vitamin intake during pregnancy and behavioral problems in Japanese children aged 5 years. Subjects were 1199 mother-child pairs. Dietary intake was assessed using a diet history questionnaire.

Relationship between oral stereognostic ability and dietary intake in older Japanese adults with complete dentures.

Purpose: Oral stereognostic ability (OSA) is a useful indicator of oral perception to recognize food characteristics during mastication. Previous studies have shown associations between dietary intake and oral health status, such as taste perception. However, the effect of oral sensory ability on dietary intake is unclear.

Lack of a meaningful association between dietary patterns and in vitro fertilization outcome among Japanese women.

Purpose: The purpose of this study was to examine whether preconception maternal dietary pattern is associated with in vitro fertilization (IVF) outcome among Japanese women.

Methods: This prospective study included 140 Japanese women who underwent conventional-IVF/intracytoplasmic sperm injection. The patients' diets during the previous month before egg retrieval were assessed with validated brief-type self-administered diet history questionnaire.

Hardness of the habitual diet and its relationship with cognitive function among 70-year-old Japanese elderly: Findings from the SONIC Study.

Background: There is increasing evidence of causal links between poor mastication and cognitive impairment, but possible effects of dietary hardness, which clearly affects mastication, on cognitive function are unknown.

Objective: We investigated the hypothesis that hardness of the habitual diet would be associated with cognitive function among older Japanese adults.

Methods: The subjects of this cross-sectional study were 635 Japanese community-dwelling people aged 69-71 years.

Adequacy of Usual Intake of Japanese Children Aged 3⁻5 Years: A Nationwide Study.

We assessed the adequacy of nutrient intakes of Japanese children aged 3⁻5 years. Dietary information was collected using a 3-nonconsective-day weighed dietary record among 143 boys and 143 girls. Estimates of usual nutrient intakes from foods and beverages were obtained using the best-power method.