Publications by authors named "Yuka Ogata"
Purpose: The association between maternal physique and prevalence of lactational mastitis (LM) in a large study population has not been reported. In this study, we aimed to evaluate the association between pre-pregnancy body mass index (BMI) and LM prevalence.
Methods: We analyzed data collected from participants enrolled in the Japan Environment and Children's Study, a nationwide birth cohort study conducted between 2011 and 2014.
Breastfeeding, depending on its duration, has been suggested to benefit children's cognitive development. We aimed to examine this issue by using the Japan Environment and Children's Study, a nationwide prospective birth cohort study. We evaluated the relationship between feeding methods and cognitive development in 2- and 4-year-old children.
View Article and Find Full Text PDFThe effect of smoking on hypertensive disorders of pregnancy is a public concern. Recent evidence suggests that the risk of hypertensive disorders of pregnancy is influenced by the presence of uterine fibroids. We explored the association between maternal smoking exposure and the risk of hypertensive disorders of pregnancy in relation to the presence of uterine fibroids using data from Japan's largest birth cohort study.
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- The study explores the link between sleep position and the occurrence of otitis media in infants, highlighting that sleep position may influence health outcomes.
- Data from the Japan Environment Children's Study involving 85,731 infants were analyzed, revealing a higher incidence of otitis media when infants slept in the prone position.
- The findings suggest that promoting safe sleep positions could help prevent otitis media among infants under 6 months old.
The development of simple and economical treatment technologies for the removal of recalcitrant organic matter is required to achieve long-term and sustainable treatment of landfill leachates in tropical regions. In this study, we evaluated the fundamental properties required to develop the floating constructed wetland (FCW), which consists of a buoyant planting unit made of foamed glass and cattails. The results showed that foamed glass alone can be used as a planting substrate for cattails.
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- The study investigated the link between atopic dermatitis in pregnant women and the risk of preterm births, focusing on those treated with ritodrine hydrochloride.
- Data from over 83,000 women with singleton pregnancies were analyzed, using self-reported questionnaires to define atopic dermatitis and multivariable logistic regression to assess preterm birth risks.
- Results showed that pregnant women with atopic dermatitis had lower odds of preterm birth before 37 weeks, indicating that atopic dermatitis might be associated with a decreased risk of preterm deliveries.
Sustainable removal of per- and polyfluoroalkyl substances (PFAS) from landfill leachate remains a pressing global challenge. To develop an effective PFAS removal technology that utilizes nature-based solutions, we considered a planting unit comprised of a microbial carrier (foamed glass) and Typha domingensis. This study evaluated the possibility of removing PFAS from landfill leachate using a planting unit through a pot experiment.
View Article and Find Full Text PDFObjectives: Hypertensive disorders of pregnancy (HDP) are a significant cause of morbidity and mortality. This study aimed to investigate whether preconception dietary fiber intake is associated with new-onset HDP.
Study Design: We identified 84,873 (primipara, 33,712; multipara, 51,161) normotensive participants from the Japan Environmental Children's Study database who delivered between 2011 and 2014.
Article Synopsis
- Women with polycystic ovary syndrome (PCOS) have a higher risk of gestational diabetes mellitus (GDM), particularly depending on their pre-pregnancy body mass index (BMI).
- A study in Japan assessed this risk using data from nearly 93,000 singleton pregnancies, finding that women with PCOS showed increased GDM risk mainly in those with higher BMI (G4 and G5 categories).
- The findings indicate that understanding the relationship between PCOS and BMI can help tailor preconception counseling for women at risk for GDM.
Secondary hip osteoarthritis due to hip dysplasia is common among Japanese populations. This study aimed to investigate the number of hip preservation surgeries performed in Japan and assess trends, by age and sex, from 2014 to 2019, focusing on hip arthroscopic surgery, based on the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB). We downloaded the files 'Number of calculations by division, sex, and age group' under 'operation (code K)' from 2014 to 2019 from the NDB Open Data Japan database.
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- The study investigates the link between breakfast habits during pregnancy and neurodevelopment in children, involving data from over 72,000 women in Japan.
- Results indicate that regular breakfast consumption is associated with better communication skills in children at age 3, particularly benefiting those in specific maternal daily energy intake groups.
- The findings suggest that maternal daily energy intake and the sex of the child can influence this association.
Article Synopsis
- Preterm birth (PTB) is a major cause of health issues in newborns, prompting this study to investigate the link between preconception dietary fiber intake and PTB risk.
- The study analyzed data from 85,116 pregnancies in Japan, categorizing participants into five groups based on their fiber intake before conception and using logistic regression to assess the relationship with PTB.
- Results indicated that higher dietary fiber intake (especially in the third, fourth, and fifth groups) was associated with a lower risk of PTB before 34 weeks, suggesting that improving dietary fiber intake could be beneficial as part of preconception care.
Article Synopsis
- There is a growing concern about developmental delays in not just very low birth weight and late preterm infants, but also in early term infants (37-38 weeks) in Japan, where research on this issue is limited.
- A study utilizing data from the Japan Environment and Children's Study analyzed 104,065 fetal records to assess neurodevelopmental risk in infants at 6 and 12 months old using established questionnaires.
- Results indicated that early term infants (37-38 weeks) showed significantly higher rates of developmental delays compared to full-term infants (40 weeks), although the risk decreased by the time they reached 12 months.
Background: There has been a recent decrease in the prevalence of infectious diseases in children worldwide due to the usage of vaccines. However, the association between cesarean delivery and infectious diseases remains unclear. Here, we aimed to clarify the association between cesarean delivery and the development of infectious diseases.
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- Maternal psychological distress, including depression and anxiety during pregnancy and postpartum, may impact children's cognitive development, but previous research has shown inconsistent results.
- * The study utilized data from the Japan Environment and Children’s Study to explore the relationship between maternal psychological distress (measured by the K6 scale) and cognitive development in 4-year-old children.
- * Findings indicated that persistent high distress levels (K6 scores ≥ 5) negatively affected language and social development in boys, while girls did not show significant differences in developmental quotients.
Article Synopsis
- - The study aimed to explore the link between high levels of urinary 8-hydroxy-2'-deoxyguanosine (U8-OHdG), a marker of oxidative stress, and the risk of preterm births (PTBs) in pregnant women.
- - Conducted as a prospective cohort study with data from over 92,000 women in Japan, the research categorized U8-OHdG levels into different groups and analyzed their association with PTB incidence.
- - Findings indicated that higher U8-OHdG levels were linked to an increased likelihood of PTBs, suggesting that oxidative stress may play a role in the occurrence of early births, particularly when excluding known causes of artificially induced PTBs.
Article Synopsis
- - The study analyzed the link between maternal intimate partner violence (IPV) before and during pregnancy and the development of autism spectrum disorder (ASD) in their 3-year-old children, using data from the Japan Environment and Children's Study.
- - It found that among nearly 80,000 offspring, 0.45% were diagnosed with ASD, with higher rates of physical IPV reported before conception compared to during pregnancy; specifically, physical IPV prior to conception was significantly associated with an increased risk of ASD.
- - The research highlights the importance of preventive care against physical IPV before pregnancy to support neurodevelopment in children, while indicating that psychological IPV does not show the same association with ASD development in the offspring.
Article Synopsis
- The study examined the link between nonreassuring fetal status (NRFS) during labor and long-term neurodevelopmental delays in children using data from nearly 73,000 women in Japan.
- Adjusted odds ratios indicated that NRFS was associated with personal-social issues in 3-year-olds, particularly for those born vaginally or via cesarean.
- However, this association did not hold for infants with better neonatal outcomes, suggesting that factors like delivery method and neonatal health may influence the relationship between NRFS and neurodevelopmental delays.
Article Synopsis
- The study aimed to analyze the differences in maternal characteristics and childhood outcomes between term and post-term births (after 37 weeks) regarding the use of tocolytic treatment.
- Data from 63,409 women in Japan was examined, revealing variations in maternal and obstetric outcomes between those who received tocolytic treatment and those who did not, but no significant differences in childhood developmental disorders.
- It was found that tocolytic treatment was linked to higher rates of offspring allergies, with an adjusted odds ratio of 1.08, indicating a slight increase in allergic conditions among children from treated mothers.
Article Synopsis
- A nationwide study in Japan analyzed data from 94,236 women with singleton births to evaluate the relationship between the timing of diagnosis for threatened preterm birth (TPTB) and the likelihood of preterm birth (PTB).
- The research categorized women by gestational age at TPTB diagnosis and parity, using logistic regression models to calculate the odds of PTB occurring before 37 and 34 weeks.
- Results indicated that the timing of TPTB diagnosis impacts PTB rates, with varying outcomes for nulliparous and multiparous women, highlighting the need for further research with comprehensive clinical data.
Article Synopsis
- - This study analyzed cord serum total cholesterol (TC) and triglyceride (TG) levels in Japanese newborns, using data from over 70,000 births collected between 2011 and 2014.
- - The findings showed that gestational age and birth weight significantly influenced cord blood TC and TG levels, with mean levels decreasing during the preterm period but increasing during the term.
- - Maternal factors such as age, health complications, and socioeconomic status were linked to variations in cord blood TC and TG levels, highlighting a lack of previous reference data for these lipid levels in Japan.
We evaluated the association between maternal prenatal folic acid supplement use/dietary folate intake and cognitive development in 4-year-old offspring (N = 3445) using data from the Japan Environment and Children's Study. Cognitive development was evaluated using the Kyoto Scale of Psychological Development 2001. Multiple regression analysis revealed that offspring of mothers who started using folic acid supplements pre-conception had a significantly higher language-social developmental quotient (DQ) (partial regression coefficient 1.
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- This study explored the relationship between maternal magnesium intake (MMI) and the occurrence of wheezing in 3-year-old children, hypothesizing that higher magnesium could reduce wheezing due to its anti-inflammatory properties.
- Data from 79,907 pregnant women in Japan were analyzed, categorizing MMI into various levels to assess its impact on wheezing incidence in children.
- The results indicated that higher MMI was slightly associated with an increased occurrence of childhood wheezing, suggesting that MMI might not significantly affect wheezing rates, and highlighting the need for further research on prenatal factors influencing childhood wheezing.
Background: Although maternal triglyceride (TG) is important for fetal growth, there are few large cohort studies investigating the relationships between maternal TG during pregnancy and neonatal outcomes.
Objectives: The objective of this study was to investigate the associations between maternal TG during the second and third trimesters and neonatal outcomes including preterm birth (PTB), low birth weight (LBW), small for gestational age (SGA) and large for gestational age (LGA).
Methods: This was a prospective birth cohort study using data of the Japan Environment and Children's Study included data of births from 2011-2014 in Japan including 79,519 pairs.