Yui Yamaoka
University of Tsukuba
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Featured researches published by Yui Yamaoka.
Journal of Epidemiology | 2016
Takeo Fujiwara; Yui Yamaoka; Naho Morisaki
BACKGROUND To estimate the prevalence of shaking and smothering and to determine risk factors in a population-based sample of mothers with 4-month-old infants in Japan. METHODS We administered a questionnaire to women who participated in a 4-month health checkup program in Aichi Prefecture, Japan (n = 6487; valid response rate, 66.8%), and assessed frequency of shaking and smothering during the past 1 month, as well as maternal, infant, and familial characteristics. Associations of shaking, smothering, and either shaking or smothering with possible risk factors were analyzed using multiple logistic regression. RESULTS Self-reported prevalence of shaking, smothering, and either shaking or smothering at least once during the past month was 3.9% (95% confidence interval [CI], 3.5%-4.4%), 2.7% (95% CI, 2.3%-3.1%), and 5.4% (95% CI, 4.9%-6.0%) respectively. Several different risk factors were found for shaking and smothering. Risk factors for either shaking or smothering were age 34 years or younger (especially 24 years or younger), age 40 years or older, full-time working, later attendance at 4-months health checkup, primiparity, living in a detached house, living on the 2nd floor or higher (especially on the 10th floor or higher), economic adversity, perceived excessive crying, and postpartum depression. Protective factors against infant abuse were living in a four-room house and having a larger number of people to consult with. CONCLUSIONS Self-reported prevalences of shaking and smothering among mothers in Japan were similar to prevalences reported in western countries. These finding may be useful for identifying mothers at increased risk of shaking and smothering their infants.
Geriatrics & Gerontology International | 2014
Felipe Alfonso Sandoval Garrido; Nanako Tamiya; Masayo Kashiwagi; Sumiko Miyata; Jiro Okochi; Yoko Moriyama; Yui Yamaoka; Kiyoshi Takamuku
To clarify the performance situation of selected quality indicators: falls, pressure ulcers and dehydration, at health care facilities for the elderly in Japan, and what structural characteristics are related to them.
Pediatrics International | 2015
Yui Yamaoka; Nanako Tamaiya; Takeo Fujiwara; Yukie Yamasaki; Akemi Matsuzawa; Satoru Miyaishi
Few studies have examined the actual conditions of fatal neglect in Japan. The aims of this study were to investigate persistent neglect among child fatalities using medico‐legal documents, and to describe the characteristics of the socio‐familial background and biological data.
PLOS ONE | 2015
Yui Yamaoka; Nanako Tamiya; Yoko Moriyama; Felipe Alfonso Sandoval Garrido; Ryo Sumazaki; Haruko Noguchi
The number of children with disability is increasing gradually in Japan. Previous researches in other countries have reported that parents as caregivers (CGs) of children with disability have mental health problems, but the actual situation has not been examined nationwide in Japan so far. The aim of this study was to evaluate the association between mental health of CGs who had children with disability and characteristics of children, CGs, and household based on the nation-wide survey. This study utilized data from 2010 Comprehensive Survey of the Living Conditions, and defined children with disability aged 6 to 17. Individual data of children and CGs were linked, and 549 pairs of them were extracted. The Japanese version of Kessler 6 (K6) was used to assess mental health status of caregiver, scored 5 and over represented to general psychological distress. Logistic regression was used to evaluate the associations of interest. The almost half (44.4%) of CGs had psychological distress (k6 score; 5 +) in nationwide, and 8.9% of CGs might have serious mental illness (K6 score; 13+). After adjusting covariates of child, CG, and household factors, CG having a current symptom (OR, 95% CI: 3.26, 1.97–5.39), CGs activity restriction (OR, 95% CI: 2.95, 1.38–6.32), low social support (OR, 95%CI: 9.31, 1.85–46.8), three generation family (OR, 95% CI: 0.49, 0.26–0.92), and lower 25% tile group of monthly household expenditure (OR, 95% CI:1.92, 1.05–3.54), were significantly associated with psychological distress of CGs. This study encourages health care providers to pay more attentions toward parents mental health, especially for in case of having low social support, and lower income family. Further research should examine the detailed information of childs disease and disability, medical service use, and quality and quantity of social support in nationwide to straighten the system for supporting services of both children with disabilities and their CGs.
SSM-Population Health | 2016
Yui Yamaoka; Nanako Tamiya; Nobuyuki Izumida; Akira Kawamura; Hideto Takahashi; Haruko Noguchi
Objective Previous studies conducted in Japan targeted only mothers who cared for children with disabilities, and lacked reference subjects, such as mothers of children without disabilities. The aim of this study was to examine the association between raising one or two children with a disability and maternal psychological distress compared to mothers of children without a disability, and to assess differences among partnered mothers living with grandparent(s), partnered mothers without grandparent(s), and single mothers. Methods This study utilized data from the Comprehensive Survey of Living Conditions (CSLC) in 2010. We merged the data of the children (aged six and over), mothers, and fathers. This study obtained 33,739 study subjects as a triad of a child (33,110 children without disabilities and 629 children with disabilities), mother, and father. The Japanese version of Kessler 6 (K6) was used to assess the psychological distress of mothers. Multivariate logistic regression was performed to assess the independent association of a child with a disability on maternal psychological distress after controlling for the basic characteristics of the children, mothers, and households. Results This study reported that raising one or two children with disabilities was significantly related to maternal psychological distress (odds ratio: 1.72 for one child, 2.85 for two children) compared to mothers of children without disability. After stratifying the analyses by family structure, significant associations remained among mothers in two-parent families but not for mothers in three-generation families and single mothers due to a small number of children with disabilities in these families. Conclusions This study reported the significant association between raising a child with a disability and maternal psychological distress in comparison to mothers of children without disabilities. Attention should be paid to not only single mothers, but also partnered mothers in two-parent families who have a child with a disability. It is important for health professionals to focus on the mental health of every mother of a child with a disability and to assess their needs for psychological support.
Pediatrics International | 2018
Yui Yamaoka; Nanako Tamiya; Akimitsu Watanabe; Yayoi Miyazono; Ryuta Tanaka; Akemi Matsuzawa; Ryo Sumazaki
Few studies have investigated the hospital‐based care utilization of children with medical complexity (CMC) in Japan. This study examined the frequency and differences in hospital‐based care utilization for CMC according to the level of medical complexity (moderate and severe).
Journal of Epidemiology | 2018
Yui Yamaoka; Naho Morisaki; Haruko Noguchi; Hideto Takahashi; Nanako Tamiya
Background Public attention is given to infants with socially high risks of child abuse and neglect, while clinical attention is provided to infants with a biologically high risk of diseases. However, few studies have systematically evaluated how biological or social factors cross over and affect cause-specific infant mortality. Methods We linked birth data with death data from the Japanese national vital statistics database for all infants born from 2003–2010. Using multivariate logistic regression, we examined the association between biological and social factors and infant mortality due to medical causes (internal causes), abuse (intentional external causes), and accidents (unintentional external causes). Results Of 8,941,501 births, 23,400 (0.26%) infants died by 1 year of age, with 21,884 (93.5%) due to internal causes, 175 (0.75%) due to intentional external causes, and 1,194 (5.1%) due to unintentional external causes. Infants with high social risk (teenage mothers, non-Japanese mothers, single mothers, unemployed household, four or more children in the household, or birth outside of health care facility) had higher risk of death by intentional, unintentional, and internal causes. Infant born with small for gestational age and preterm had higher risks of deaths by internal and unintentional causes, but not by intentional causes. Conclusions Both biological as well as social factors were associated with infant deaths due to internal and external causes. Interdisciplinary support from both public health and clinical-care professionals is needed for infants with high social or biological risk to prevent disease and injury.
Geriatrics & Gerontology International | 2018
Takehiro Sugiyama; Nanako Tamiya; Taeko Watanabe; Tomoko Wakui; Taiga Shibayama; Yoko Moriyama; Yui Yamaoka; Haruko Noguchi
The public mandatory long‐term care insurance system in Japan has supposedly mitigated the care burden for family caregivers of older adults, whereas family caregivers still play a considerable role in providing care. The effect of informal caregiving on the caregivers health has been of great interest. We investigated the relationship between the amplitude of informal caregiving and caregiver participation in health check‐ups in Japan.
Journal of the Endocrine Society | 2017
Noboru Uchida; Naoko Amano; Yui Yamaoka; Ayumi Uematsu; Yuji Sekine; Makoto Suzuki; Jun Watanabe; Koshiro Nishimoto; Kuniaki Mukai; Ryuji Fukuzawa; Tomonobu Hasegawa; Tomohiro Ishii
Aldosterone-producing adenoma (APA), a subtype of primary aldosteronism, is a common cause of secondary hypertension in adults. Somatic KCNJ5 mutations have been identified in about 12%–80% of adult-onset APA. In contrast, there has been no previous reported case of pediatric-onset APA in whom a somatic KCNJ5 mutation was confirmed. We report an 11-year-old Japanese girl who had experienced recurrent headaches and nausea for more than 2 years before hypertension was observed (blood pressure, 150/82 mm Hg). Plasma renin activity was <0.1 ng/mL per hour even after a captopril-challenge or upright furosemide-loading test. Plasma aldosterone concentrations (PACs) before and after saline-infusion test were 28.0 and 40.6 ng/dL, respectively. Plasma adrenocorticotropic hormone (ACTH) and serum cortisol levels were 16.5 pg/mL and 16.7 µg/dL, respectively. The patient was diagnosed with APA in the left adrenal gland on the basis of selective adrenal venous sampling after ACTH stimulation (PAC in the left adrenal vein, 3630 ng/dL) and histopathologic findings of the tumor obtained by laparoscopic left adrenalectomy. Sanger sequencing of KCNJ5 using genomic DNA from peripheral lymphocytes and laser-captured microdissected APA tissues demonstrated the presence of a somatic KCNJ5 mutation p.L168R, previously reported only in adult-onset APA. Immunohistochemistry detected strong immunoreactivity for CYP11B2, but not for CYP11B1 in the APA, consistent with the endocrinologic findings in this patient. Somatic KCNJ5 mutations are also identified in pediatric-onset APA. Further cases are needed to elucidate functional characteristics of pediatric-onset APA with a somatic KCNJ5 mutation.
Critical Care Medicine | 2015
Toshikazu Abe; Nanako Tamiya; Isao Nagata; Uchida Masatoshi; Yui Yamaoka
Crit Care Med 2015 • Volume 43 • Number 12 (Suppl.) cost between regular unit and ICU of