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  1. Article ; Online: Association between gestational weight gain and behavioral problems of the offspring aged 6-7 years: A population-based study in Japan.

    Terada, Shuhei / Isumi, Aya / Doi, Satomi / Tani, Yukako / Fujiwara, Takeo

    International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics

    2024  

    Abstract: Objective: To identify the optimal gestational weight gain (GWG) thresholds for behavioral problems and prosocial behavior in 6- to 7-year-old children.: Methods: A retrospective cohort study was conducted using data from the Adachi Child Health ... ...

    Abstract Objective: To identify the optimal gestational weight gain (GWG) thresholds for behavioral problems and prosocial behavior in 6- to 7-year-old children.
    Methods: A retrospective cohort study was conducted using data from the Adachi Child Health Impact of Living Difficulty study, including all first-graders in public schools in Adachi, Tokyo, in 2017, 2019, and 2021 (n = 11 048, response rate = 80.1%). GWG was based on clinical records in the Mother and Child Health Handbook. Total difficulties and prosocial behavior were assessed using the Strength and Difficulties Questionnaire. Logistic regression models with restricted cubic splines, and quintile categories were employed to examine the association of GWG with the clinical range of total difficulties and prosocial behavior, controlling for covariates.
    Results: The association between GWG and total difficulties exhibited a reverse J-shaped pattern, with low GWG, but not high GWG, increasing the risk (odds ratio [OR] 1.20, 95% confidence interval [CI] 1.01-1.42, P = 0.039 for GWG < 7 kg; OR 1.03, 95% CI 0.85-1.24, P = 0.786 for GWG > 14 kg), referencing the median (10 kg). High GWG was associated with a lower risk of problems in prosocial behavior (OR = 0.77, 95% CI 0.62-0.95, P = 0.017 for GWG > 14 kg; OR 1.06, 95% CI 0.88-1.27, P = 0.532 for GWG <7 kg).
    Conclusion: GWG less than 7 kg may increase the risk of total difficulties, whereas GWG over 14 kg may serve as a protective factor for prosocial behavior in 6- to 7-year-old children.
    Language English
    Publishing date 2024-02-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80149-5
    ISSN 1879-3479 ; 0020-7292
    ISSN (online) 1879-3479
    ISSN 0020-7292
    DOI 10.1002/ijgo.15410
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Persistent poverty and child dental caries: time-varying exposure analysis.

    Matsuyama, Yusuke / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo

    Journal of epidemiology and community health

    2023  Volume 77, Issue 10, Page(s) 670–675

    Abstract: Background: This study investigated the cumulative impact of persistent poverty on dental caries among elementary schoolchildren in Japan.: Methods: Data were derived from four-wave longitudinal data of children in all public elementary schools in ... ...

    Abstract Background: This study investigated the cumulative impact of persistent poverty on dental caries among elementary schoolchildren in Japan.
    Methods: Data were derived from four-wave longitudinal data of children in all public elementary schools in Adachi City, Tokyo, Japan, from 2015 to 2020 (n=4291, response rate: 80.1%-83.8%). Poverty status, defined as annual household income <JPY3 million, material deprivation or payment difficulties for lifeline utilities, was assessed by caregiver questionnaires when the children were in the first, second, fourth and sixth grades. School dentists assessed dental caries. We estimated the difference in the number of primary and permanent teeth with incidences of dental caries from second to sixth grade by persistent poverty and never having experienced poverty. Targeted maximum likelihood estimation was used to consider baseline and time-varying confounders.<br />Results: Children with persistent poverty experienced more dental caries (mean: 3.81, SD: 3.73) than children who had never experienced poverty (mean: 2.39, SD: 3.27). After controlling for confounders, being in persistent poverty was significantly associated with having more dental caries than never being in poverty (mean difference: 1.54, 95% CI 0.60, 2.48). The magnitude of the association was greater than that of poverty assessed at first grade only (mean difference: 0.75, 95% CI 0.35, 1.16) or experience of poverty at any of the four waves (mean difference: 0.69, 95% CI 0.39, 0.99).
    Conclusion: The cumulative impact of persistent poverty could be larger than the poverty assessed at a single time point.
    MeSH term(s) Humans ; Child ; Dental Caries/epidemiology ; Poverty ; Japan/epidemiology ; Schools ; Surveys and Questionnaires
    Language English
    Publishing date 2023-07-19
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 391868-3
    ISSN 1470-2738 ; 0142-467X ; 0141-7681 ; 0143-005X
    ISSN (online) 1470-2738
    ISSN 0142-467X ; 0141-7681 ; 0143-005X
    DOI 10.1136/jech-2022-220073
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  3. Article ; Online: Food Categories for Breakfast and Mental Health among Children in Japan: Results from the A-CHILD Study.

    Tani, Yukako / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo

    Nutrients

    2023  Volume 15, Issue 5

    Abstract: There is limited evidence that what children eat for breakfast contributes to their mental health. This study aimed to examine the associations between food categories for breakfast and mental health among children in Japan. A proportion of participants ... ...

    Abstract There is limited evidence that what children eat for breakfast contributes to their mental health. This study aimed to examine the associations between food categories for breakfast and mental health among children in Japan. A proportion of participants aged 9-10 years in the Adachi Child Health Impact of Living Difficulty (A-CHILD) study in Japan who consumed breakfast daily were included (
    MeSH term(s) Humans ; Animals ; Breakfast ; Japan ; Mental Health ; Fruit ; Milk ; Edible Grain
    Language English
    Publishing date 2023-02-22
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2518386-2
    ISSN 2072-6643 ; 2072-6643
    ISSN (online) 2072-6643
    ISSN 2072-6643
    DOI 10.3390/nu15051091
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  4. Article ; Online: Association of maternal pre-pregnancy body mass index with resilience and prosociality of the offspring aged 6-7 years old: a population-based cohort study in Japan.

    Terada, Shuhei / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo

    European child & adolescent psychiatry

    2023  Volume 33, Issue 3, Page(s) 861–869

    Abstract: The association between maternal pre-pregnancy obesity and child behavior problems has been widely researched, leaving a gap in understanding the positive aspects of children's mental health. The present study aimed to investigate the association between ...

    Abstract The association between maternal pre-pregnancy obesity and child behavior problems has been widely researched, leaving a gap in understanding the positive aspects of children's mental health. The present study aimed to investigate the association between maternal pre-pregnancy body mass index (BMI) and resilience and prosociality among 6-7 year-old children in Japan. A retrospective cohort study was conducted using data from the Adachi Child Health Impact of Living Difficulty (A-CHILD) study, a population-based study in 2017 and 2019 including all first-grade students in public schools in Adachi, Tokyo, Japan (n = 7328, response rate = 84.7%). Resilience and prosociality were measured by the Children's Resilient Coping Scale and the Strength and Difficulties Questionnaire, respectively. Maternal pre-pregnancy weight and height were reported based on the Mother and Child Health Handbook, and BMI was categorized as underweight (BMI < 18.5), normal weight (BMI 18.5-24.9), overweight (BMI 25.0-29.9), and obesity (BMI ≥ 30). Linear regression models were employed to control for covariates. Maternal pre-pregnancy obesity was found to be negatively associated with child resilience (coefficient: - 3.29; 95% CI - 6.42--0.15), while maternal underweight was negatively associated with child prosociality (coefficient: - 0.12; 95% CI - 0.24--0.005) compared to mothers of pre-pregnancy normal BMI. Perinatal factors, such as gestational weight gain, gestational age, and birth weight, did not mediate the association. Our findings suggest that maternal pre-pregnancy obesity is linked to decreased resilience and maternal underweight is linked to decreased prosociality in children aged 6-7 years. Maintaining an appropriate BMI range before pregnancy may be crucial for enhancing resilience and prosociality of offspring.
    MeSH term(s) Pregnancy ; Female ; Humans ; Child ; Body Mass Index ; Cohort Studies ; Retrospective Studies ; Japan/epidemiology ; Resilience, Psychological ; Thinness/epidemiology ; Thinness/complications ; Obesity/complications ; Overweight/epidemiology
    Language English
    Publishing date 2023-04-23
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1118299-4
    ISSN 1435-165X ; 1018-8827 ; 1433-5719
    ISSN (online) 1435-165X
    ISSN 1018-8827 ; 1433-5719
    DOI 10.1007/s00787-023-02209-5
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  5. Article ; Online: Association between maternal dissatisfaction with oneself at birth and shaking and smothering toward the offspring up to 18 months old.

    Kawahara, Tomoki / Isumi, Aya / Ochi, Manami / Doi, Satomi Kato / Surkan, Pamela J / Fujiwara, Takeo

    Child abuse & neglect

    2024  Volume 153, Page(s) 106816

    Abstract: Background: A mother who feels dissatisfaction with herself may resort to abusive behavior such as shaking or smothering toward their offspring. Understanding this association can inform effective prevention strategies.: Objective: This study aimed ... ...

    Abstract Background: A mother who feels dissatisfaction with herself may resort to abusive behavior such as shaking or smothering toward their offspring. Understanding this association can inform effective prevention strategies.
    Objective: This study aimed to investigate the associations between maternal feelings of dissatisfaction with oneself and infant physical abuse.
    Participants and setting: The study included 434 mothers who had recently given birth in two obstetric wards in a relatively wealthy area in Tokyo, Japan.
    Methods: Adopting a longitudinal design, the study used questionnaires post-childbirth to measure mothers' dissatisfaction with themselves. This involved evaluating perceptions of failing to meet personal standards or self-image. Physical abuse (specifically shaking or smothering) in infants was tracked at 3, 6, 12, and 18 months. Data analysis comprised multilevel analysis, group-based trajectory modeling, and multivariable logistic regression to explore the association between maternal dissatisfaction and child physical abuse.
    Results: Multilevel analysis showed that mothers with middle or high dissatisfaction with themselves were more likely to abuse their infant compared to mothers with low dissatisfaction with themselves (adjusted odds ratios [aOR] 5.71, 95 % confidence interval [CI], 1.06-30.78 and aOR 12.47, 95 % CI: 2.11-73.69, respectively). Trajectory analyses indicated that mothers with middle or high dissatisfaction with themselves were consistently more likely to abuse their infants up to 18 months (aOR 8.08, 95 % CI 1.61-40.53 and aOR 6.42, 95 % CI 1.27-32.43, respectively).
    Conclusions: Our findings highlight a robust association between mother's dissatisfaction with themselves and a higher risk of infant physical abuse. These insights call for a comprehensive review of preventive measures for childhood physical abuse.
    Language English
    Publishing date 2024-05-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 799143-5
    ISSN 1873-7757 ; 0145-2134
    ISSN (online) 1873-7757
    ISSN 0145-2134
    DOI 10.1016/j.chiabu.2024.106816
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  6. Article ; Online: Home visitors' needs and perceptions of the benefits of a home visiting program for childcare support in Japan: A qualitative study of home visitors.

    Yamaoka, Yui / Ochi, Manami / Fukui, Mitsuru / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo / Nawa, Nobutoshi

    Child abuse & neglect

    2024  Volume 153, Page(s) 106853

    Abstract: Background: The Home Visiting Program for Childcare Support (HV-CCS; "Yoiku Shien Homon Jigyo" in Japanese) has targeted families in need of parenting support and those at risk of child maltreatment in Japan.: Objective: The aim of this study was to ... ...

    Abstract Background: The Home Visiting Program for Childcare Support (HV-CCS; "Yoiku Shien Homon Jigyo" in Japanese) has targeted families in need of parenting support and those at risk of child maltreatment in Japan.
    Objective: The aim of this study was to explore the needs and perceptions of benefits of home visitors in HV-CCS.
    Participants and setting: Sixteen home visitors agreed to participate in the interview.
    Methods: This study conducted 1-hour semi-structured interviews with 16 home visitors and analyzed approximately 18 h of interview data using thematic analysis.
    Results: The findings suggested that home visitors required training to enhance individual skills and knowledge about mental health of caregivers or children. Additionally, they required environmental support, particularly for transportation expenses and parking places. Multidisciplinary communicative support is also necessary, as well as system to improve the process of support. Home visitor perceived the HV-CCS as beneficial in preventing child maltreatment by improving parenting skills and home environment, providing psychological support for mothers, and entering families' intimate spaces.
    Conclusions: To ensure the continuity and improvement of home visits for parents and children in Japan, it is essential to address the identified needs of home visitors.
    Language English
    Publishing date 2024-05-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 799143-5
    ISSN 1873-7757 ; 0145-2134
    ISSN (online) 1873-7757
    ISSN 0145-2134
    DOI 10.1016/j.chiabu.2024.106853
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  7. Article: Association between subjective degree of influence in class and thinness among adolescents in Japan.

    Ishikawa, Nanako / Koyama, Yuna / Doi, Satomi / Isumi, Aya / Fujiwara, Takeo

    Frontiers in pediatrics

    2023  Volume 10, Page(s) 938139

    Abstract: Social status in school, measured by subjective degree of influence in class (DOI), may influence thinness among adolescents. This study examined the association between subjective degree of influence in class and thinness among Japanese adolescents. ... ...

    Abstract Social status in school, measured by subjective degree of influence in class (DOI), may influence thinness among adolescents. This study examined the association between subjective degree of influence in class and thinness among Japanese adolescents. Data were obtained from the Kochi Child Health Impact of Living Difficulty (K-CHILD) study in 2016, which Was a population-based study targeting 5th, 8th and 11th grade adolescents living in Kochi Prefecture, Japan (
    Language English
    Publishing date 2023-01-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711999-3
    ISSN 2296-2360
    ISSN 2296-2360
    DOI 10.3389/fped.2022.938139
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  8. Article ; Online: Number of Siblings and Social Capital Among Parents Rearing Schoolchildren: Results From the A-CHILD Study.

    Tani, Yukako / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo

    Journal of epidemiology

    2022  Volume 33, Issue 9, Page(s) 478–483

    Abstract: Background: Having siblings may foster sociality; however, little is known about whether sibling number determines social capital, the resources obtained through social networks. We examined the association between sibling number and social capital ... ...

    Abstract Background: Having siblings may foster sociality; however, little is known about whether sibling number determines social capital, the resources obtained through social networks. We examined the association between sibling number and social capital among Japanese parents rearing schoolchildren.
    Methods: We used cross-sectional data from the 2018 and 2019 Adachi Child Health Impact of Living Difficulty (A-CHILD) study, targeting all primary and junior high school students and their parents in Adachi, Tokyo, Japan (n = 8,082). Individual-level social capital was evaluated by assessing caregivers' social cohesion, social support, and group affiliation. All analyses were adjusted for age and sex.
    Results: An inverse U-shaped association was found between sibling number and social capital. Adults who grew up with one or two, but not three or more siblings had greater social support (coefficient = 0.23; 95% confidence interval [CI], 0.06-0.40 and coefficient = 0.46; 95% CI, 0.29-0.64, respectively) than those who grew up as an only child, after covariate adjustment. Adults who grew up with two or three, but not one or four or more siblings had greater group affiliation (coefficient = 0.09; 95% CI, 0.03-0.16 and coefficient = 0.09; 95% CI, 0.01-0.18, respectively) than those who grew up as an only child, after covariate adjustment. Sibling number was not associated with social cohesion.
    Conclusion: Growing up with one to three siblings was associated with higher social capital in adulthood than being an only child. Having siblings may provide an opportunity to foster social capital.
    MeSH term(s) Adult ; Humans ; Child ; Siblings ; Social Capital ; Cross-Sectional Studies ; Japan ; Parents
    Language English
    Publishing date 2022-07-13
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1442118-5
    ISSN 1349-9092 ; 0917-5040
    ISSN (online) 1349-9092
    ISSN 0917-5040
    DOI 10.2188/jea.JE20210510
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  9. Article ; Online: Being Left Alone at Home and Dental Caries of Children Aged 6-7 Years.

    Matsuyama, Yusuke / Isumi, Aya / Doi, Satomi / Fujiwara, Takeo

    Journal of epidemiology

    2022  Volume 33, Issue 6, Page(s) 303–310

    Abstract: Background: Leaving children alone at home is considered child neglect in some countries but is not prohibited in Japan. We investigated the association between being left alone at home and dental caries of children aged 6-7 years in Japan.: Methods: ...

    Abstract Background: Leaving children alone at home is considered child neglect in some countries but is not prohibited in Japan. We investigated the association between being left alone at home and dental caries of children aged 6-7 years in Japan.
    Methods: The data on first graders in all 69 public elementary schools in Adachi, Tokyo, obtained from repeated cross-sectional surveys in 2015, 2017, and 2019 were analyzed. Caregivers answered the questionnaire, and the data were linked to the information on children's dental caries evaluated in school dental health checkups (N = 12,029). Poisson regression analysis with propensity score matching (PSM) was applied to account for confounders.
    Results: Leaving children alone at home for ≥1 hour during the weekdays was reported by 46.4% of the caregivers, which did not vary across years. The PSM analysis showed that, compared with children never being left alone at home, children being left alone at home for ≥1 time per week had more dental caries (mean ratio [MR] 1.11; 95% confidence interval (CI), 1.02-1.21; P = 0.016), while <1 time per week was not associated (MR 0.97; 95% CI, 0.92-1.03; P = 0.345). The difference between those being left alone at home for <1 time per week and those being left alone for ≥1 time per week was not significant after applying Bonferroni correction (MR 1.12; 95% CI, 1.00-1.26; P = 0.041).
    Conclusion: Leaving children alone at home for ≥1 hour every week might be a risk factor for dental caries of children aged 6-7 years.
    MeSH term(s) Humans ; Child ; Cross-Sectional Studies ; Dental Caries/epidemiology ; Japan/epidemiology ; Schools ; Tokyo
    Language English
    Publishing date 2022-03-23
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1442118-5
    ISSN 1349-9092 ; 0917-5040
    ISSN (online) 1349-9092
    ISSN 0917-5040
    DOI 10.2188/jea.JE20210321
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  10. Article ; Online: Association of Adverse Childhood Experiences Including Low Household Income and Peer Isolation With Obesity Among Japanese Adolescents: Results From A-CHILD Study.

    Doi, Satomi / Isumi, Aya / Fujiwara, Takeo

    Frontiers in public health

    2022  Volume 10, Page(s) 754765

    Abstract: Background: Adverse childhood experience (ACE) is a major risk factor for obesity in both adults and adolescents. Although, arguably, peer isolation and low household income could be conceived as of ACEs, few studies have included these experiences as ... ...

    Abstract Background: Adverse childhood experience (ACE) is a major risk factor for obesity in both adults and adolescents. Although, arguably, peer isolation and low household income could be conceived as of ACEs, few studies have included these experiences as ACEs.
    Objectives: This study aims to examine whether ACEs, including peer isolation and low household income, are associated with obesity in adolescents.
    Methods: We used pooled data from the Adachi Child Health Impact of Living Difficulty (A-CHILD) study in 2016 and 2018, which is a school-based cross-sectional study in Adachi City, Tokyo, Japan,
    Results: The number of ACEs was not associated with overweight or obesity among adolescents after adjusting for covariates. As for each type of ACE, single parenthood and low household income showed a significant independent association with obesity.
    Conclusions: The number of ACEs was not associated with overweight or obesity in Japanese adolescents, while single parenthood and low household income showed a significant positive association with obesity. Further longitudinal studies are needed to replicate this association among adolescents.
    MeSH term(s) Adolescent ; Adult ; Adverse Childhood Experiences ; Child ; Cross-Sectional Studies ; Humans ; Japan/epidemiology ; Obesity/epidemiology ; Overweight
    Language English
    Publishing date 2022-04-05
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2711781-9
    ISSN 2296-2565 ; 2296-2565
    ISSN (online) 2296-2565
    ISSN 2296-2565
    DOI 10.3389/fpubh.2022.754765
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