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Dive into the research topics where Kenji Takehara is active.

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Featured researches published by Kenji Takehara.


PLOS ONE | 2015

Antenatal Risk Factors of Postpartum Depression at 20 Weeks Gestation in a Japanese Sample: Psychosocial Perspectives from a Cohort Study in Tokyo.

Yoshiyuki Tachibana; Tomoe Koizumi; Kenji Takehara; Naoko Kakee; Hiromi Tsujii; Rintaro Mori; Eisuke Inoue; Erika Ota; Keiko Yoshida; Keiko Kasai; Makiko Okuyama; Takahiko Kubo

Background Prevalence of postnatal depression (PND) is high (Western countries, 10–15%; Japan, 17%). PND can cause parenting impairment and affect family health (e.g. child behaviors, cognitive development and physical health). This study aimed to reveal the risk factors of PND during the pregnancy period in a Japanese sample, and to identify the psychosocial risk factors of PND that should be appended to existing obstetric interview sheets. A cohort study with a Japanese sample was conducted. Methods All 14 obstetrics hospitals in the Setagaya ward, Tokyo, Japan, participated in this study. Pregnant women who booked their delivery between December 2012 and May 2013 were enrolled. Data used for this study were collected at 20 weeks gestation, a few days and one month postnatal. The questionnaires consisted of psychosocial factors and the Edinburgh Postnatal Depression Scale (EPDS). To identify PND risk factors, multivariate analyses were performed. Results A total of 1,775 women participated in this study. Eventually, the data of 1,133 women were used for the multivariate analyses. The demonstrated significant risk factors include EPDS score, primipara, “a perceived lack of family cohesion”, “current physical illness treatment” and “current psychiatric illness treatment”. Conclusion This study highlights the importance of mental health screening using psychological measures during the pregnancy period. In addition, family environment, parity, physical and psychiatric illness should be paid attention by professionals in maternal and child health. The results also suggest that mothers’ feelings of developing their families should be supported.


PLOS ONE | 2014

High rate of awarding compensation for claims of injuries related to clinical trials by pharmaceutical companies in Japan: a questionnaire survey.

Chieko Kurihara; Hideo Kusuoka; Shunsuke Ono; Naoko Kakee; Kazuyuki Saito; Kenji Takehara; Kiyokazu Tsujide; Yuzo Nabeoka; Takuya Sakuhiro; Hiroshi Aoki; Noriko Morishita; Chieko Suzuki; Shigeo Kachi; Emiko Kondo; Yukiko Komori; Tetsu Isobe; Shigeru Kageyama; Hiroshi Watanabe

Introduction International norms and ethical standards have suggested that compensation for research-related injury should be provided to injured research volunteers. However, statistical data of incidence of compensation claims and the rate of awarding them have been rarely reported. Method Questionnaire surveys were sent to pharmaceutical companies and medical institutions, focusing on industry-initiated clinical trials aiming at new drug applications (NDAs) on patient volunteers in Japan. Results With the answers from pharmaceutical companies, the incidence of compensation was 0.8%, including 0.06% of monetary compensation. Of the cases of compensation claims, 99% were awarded. In turn, with the answers from medical institutions, the incidence of compensation was 0.6%, including 0.4% of serious but not death cases, and 0.04% of death cases. Furthermore, most claims for compensation were initiated by medical institutions, rather than by the patients. On the other hand, with the answers from clinical trial volunteers, 3% of respondents received compensations. These compensated cases were 25% of the injuries which cannot be ruled out from the scope of compensation. Conclusion Our study results demonstrated that Japanese pharmaceutical companies have provided a high rate of compensation for clinical trial-related injuries despite the possibility of overestimation. In the era of global clinical development, our study indicates the importance of further surveys to find each countrys compensation policy by determining how it is being implemented based on a survey of the actual status of compensation coming from statistical data.


Scientific Reports | 2016

Hospitalization risk factors for children’s lower respiratory tract infection: A population-based, cross-sectional study in Mongolia

Amarjargal Dagvadorj; Erika Ota; Sadequa Shahrook; Purevdorj Baljinnyam Olkhanud; Kenji Takehara; Naoko Hikita; Bayasgalantai Bavuusuren; Rintaro Mori; Takeo Nakayama

This study aimed to assess the potential risk factors for lower respiratory tract infection (LRTI)-related hospital admissions in Mongolian children. A population-based cross-sectional study was conducted in rural Mongolia in 2013, and 1,013 mother–child pairs were included. Of the participating children, 38.9% were admitted to hospital with LRTIs. Home smoking, low birthweight, being a male child, exclusive breastfeeding and healthcare-seeking behaviour showed substantial association with LRTI-related hospital admissions. Number of cigarettes smoked by family members showed a dose-response relationship and increased hospital admissions. Strategies to prevent second-hand-smoke exposure from adult smokers, especially inside the home, are crucial to preventing LRTI-related hospital admissions for children in Mongolia. Improving rates of exclusive breastfeeding and increasing birthweight have great potential to decrease the likelihood of children acquiring a LRTI. Educational initiatives are also necessary for women who are less likely to seek out care for their children’s symptoms.


Health Education Journal | 2018

Utilisation of maternal and child health handbook in Mongolia: A cross-sectional study

Naoko Hikita; Megumi Haruna; Masayo Matsuzaki; Mie Shiraishi; Kenji Takehara; Amarjargal Dagvadorj; Narantuya Sumya; Bayasgalantai Bavuusuren; Purevdorj Baljinnyam; Erika Ota; Rintaro Mori

Objective: This study investigated the use of a Maternal and Child Health (MCH) handbook, and related factors, in Mongolia. Design: Population-based cross-sectional study. Setting: Bulgan Province, Mongolia. Method: MCH handbook use was determined by examining whether participants had read it or recorded their health-related information into it. Multiple logistic regression analysis was performed to reveal factors related to MCH handbook utilisation. Results: Of the 716 participants, 631 (88.1%) read the MCH handbook and 428 (59.8%) recorded their health-related information in it. Mothers with middle or high educational attainment were more likely to have read it than were those with low educational attainment (adjusted odds ratio [AOR] = 2.52, 95% confidence interval [CI] = 1.41–4.50; AOR = 3.19, 95% CI = 1.29–7.93, respectively). Literate women and those who had been taught to use the handbook were more likely to read it (AOR = 3.19, 95% CI = 1.68–6.05; AOR = 2.42, 95% CI = 1.31–4.46, respectively). Mothers with a middle or very high wealth index were more likely to have read it than were those with a very low index. Mothers with middle or high educational attainment were more likely to make records in it than were those with low attainment. Mothers who were taught to use the handbook were more likely to make records in it, while those who had children with chronic diseases were less likely to do so. Conclusion: Women’s literacy levels, educational attainment, economic status and effective explanation of its usage must be considered in order to enhance the handbook’s effectiveness.


BMJ Open | 2015

Efficacy of advice from healthcare professionals to pregnant women on avoiding constrictive clothing around the trunk: a study protocol for a randomised controlled trial.

Kenji Takehara; Sachiko Kato; Aiko Sasaki; Seung Chik Jwa; Naoko Kakee; Haruhiko Sago; Yuko Noguchi; Tomoko Aoki; Eisuke Inoue; Chieko Nitta; Yumiko Ishii

Introduction As a component of midwife care, eliminating clothing that constricts the trunk has been shown to markedly elevate the uterine fundus, soften the uterus and abdomen, and reduce the abdominal wall tension in women admitted to hospital due to the risk of miscarriage or premature delivery. However, no prospective study has conclusively verified the efficacy of avoiding constrictive clothes around the trunk in pregnant women. We aim to verify the efficacy of instructing pregnant women to wear loose clothing that does not constrict the trunk to reduce the risk of premature birth and improve quality of life (QoL) during pregnancy. Methods and analysis We will conduct a randomised controlled trial of pregnant women scheduled to deliver at the National Center for Child Health and Development in Tokyo, Japan. A total of 616 pregnant women, from whom written informed consent will be obtained, will be allocated randomly to an intervention group or a control group. Women in the control group will be provided with anaemia prevention leaflets at 20 weeks’ gestation and skin-care leaflets at 30 weeks’ gestation. Women in the intervention group will be provided with the same leaflets and will also receive health advice from health professionals to avoid constrictive clothing around the trunk. The primary outcome will be a difference between these groups in the frequency of any one of the following category variables: (1) cervical length <30 mm up to 28 weeks’ gestation, (2) hospital admission for threatened premature delivery, or (3) premature delivery. Secondary outcomes will include QoL during pregnancy, maternal state of health, and status of fetal development. Ethics and dissemination The Institutional Review Board and Ethics Committee at the National Center for Child Health and Development, Japan, has approved this study. Our findings will be widely disseminated through conference presentations and peer-reviewed publications. Trial registration number UMIN000016853.


Journal of Affective Disorders | 2017

Effects of prenatal childbirth education for partners of pregnant women on paternal postnatal mental health and couple relationship: A systematic review.

Maiko Suto; Kenji Takehara; Yumina Yamane; Erika Ota


Maternal and Child Health Journal | 2016

Maternal and Child Health in Mongolia at 3 Years After Childbirth: A Population-Based Cross-Sectional Descriptive Study

Kenji Takehara; Amarjargal Dagvadorj; Naoko Hikita; Narantuya Sumya; Solongo Ganhuyag; Bayasgalantai Bavuusuren; Erika Ota; Megumi Haruna; Mikako Yoshida; Sachiko Kita; Hisashi Noma; Rintaro Mori


Systematic Reviews | 2016

Effects of prenatal childbirth education for partners of pregnant women on paternal postnatal mental health: a systematic review and meta-analysis protocol

Maiko Suto; Kenji Takehara; Yumina Yamane; Erika Ota


Community Mental Health Journal | 2016

A Comparison of Self-Rated and Female Partner-Rated Scales in the Assessment of Paternal Prenatal Depression

Mizuho Konishi; Yoshiyuki Tachibana; Julian Tang; Kenji Takehara; Takahiko Kubo; Keiji Hashimoto; Hiroshi Kitazawa; Hirohisa Saito; Yukihiro Ohya


Cochrane Database of Systematic Reviews | 2017

Assessment and support during early labour for improving birth outcomes

Shinobu Kobayashi; Nobutsugu Hanada; Masayo Matsuzaki; Kenji Takehara; Erika Ota; Hatoko Sasaki; Chie Nagata; Rintaro Mori

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Amarjargal Dagvadorj

Ottawa Hospital Research Institute

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Chieko Kurihara

National Institute of Radiological Sciences

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