Faculty Profiles - MATSUMOTO Naomi

Papers - MATSUMOTO Naomi

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Delayed diagnostic interval and survival outcomes in pediatric leukemia: A single‐center, retrospective study Reviewed

Kosuke Tamefusa, Motoharu Ochi, Hisashi Ishida, Takahiro Shiwaku, Kiichiro Kanamitsu, Kaori Fujiwara, Yasuhisa Tatebe, Naomi Matsumoto, Kana Washio, Hirokazu Tsukahara

European Journal of Haematology 2023.12

Publishing type：Research paper (scientific journal) Publisher：Wiley

Abstract

Objective

This study primarily focused on the diagnostic interval (DI), defined as the duration from the onset of leukemic symptoms to diagnosis. We investigated whether a prolonged DI is associated with the outcomes of pediatric leukemia.

Methods

We retrospectively collected data of children with newly diagnosed pediatric leukemia at Okayama University Hospital from January 2007 to December 2022. Survival analyses were conducted using Kaplan–Meier methods, and an unadjusted analysis to compare differences in survival was performed using the log‐rank test.

Results

In total, 103 children with leukemia were included in the analysis. The median DI was 20 days (interquartile range, 9.5–33.5 days). A prolonged DI (≥30 days) demonstrated no association with either 5‐year event‐free survival (70.1% for <30 days and 68.3% for ≥30 days, p = .99, log‐rank test) or overall survival (84.7% for <30 days and 89.4% for ≥30 days, p = .85, log‐rank test).

Conclusions

A prolonged DI was not associated with the survival of children with leukemia. If a precise classification of leukemia biology is provided for pediatric patients, a prolonged DI may have little impact on the prognosis of these patients.

DOI： 10.1111/ejh.14162

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Association Between Clinical Remission of Infantile-Onset Allergic Rhinitis During the School-Age Period and the Type of Housing: A Longitudinal Population-Based Japanese Study Reviewed

Kensuke Uraguchi, Naomi Matsumoto, Toshiharu Mitsuhashi, Soshi Takao, Seiichiro Makihara, Mizuo Ando, Takashi Yorifuji

Journal of Pediatric Health Care Accepted 2023.12

A nationwide birth cohort in Japan showed increased risk of early childhood hospitalisation in infants born small for gestational age. Reviewed International journal

Asami Ohyama, Naomi Matsumoto, Kei Tamai, Yosuke Washio, Junko Yoshimoto, Takashi Yorifuji, Hirokazu Tsukahara

Acta paediatrica (Oslo, Norway : 1992) 2023.11

Language：English Publishing type：Research paper (scientific journal)

AIM: To examine associations between children being born small for gestational age and childhood hospitalisation following term and preterm births. METHODS: This study included 34 564 children from a nationwide population-based longitudinal survey starting in 2010, comprising 32 603 term births and 1961 preterm births. Children's hospitalisation history was examined during two observational periods, 6-18 and 6-66 months of age. Logistic regression analysis was conducted, adjusting for child and parental confounders, with children born appropriate for gestational age as reference. RESULTS: Children born small for gestational age were more likely to be hospitalised during early childhood than those born appropriate for gestational age. The odds ratio (95% confidence interval) for hospitalisation from 6 to 66 months of age was 1.19 (1.05-1.34) in term children born small for gestational age and 1.47 (1.05-2.06) for preterm children born small for gestational age, compared with those born appropriate for gestational age. The risk of hospitalisation from 6 to 66 months of age in children born small for gestational age was observed for bronchitis/pneumonia. CONCLUSION: We observed the adverse effects of small for gestational age on hospitalisation during early childhood in both term and preterm births, particularly for bronchitis and pneumonia.

DOI： 10.1111/apa.17032

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COVID-19 pandemic and language development in children at 18 months: a repeated cross-sectional study over a 6-year period in Japan Reviewed

Rumi Matsuo, Naomi Matsumoto, Toshiharu Mitsuhashi, Takashi Yorifuji

Archives of Disease in Childhood archdischild - 2023 2023.11

Publishing type：Research paper (scientific journal) Publisher：BMJ

Objective

To evaluate the impact of the COVID-19 pandemic experience on language development among children, we compared language development at 18 months of age, before and during the pandemic in Japan, where strict control measures continued over a long period.

Methods

This was a repeated cross-sectional study and we included children who attended the 18-month health check-up provided by the Okayama City Public Health Center between January 2017 and December 2022 (n=33 484). We compared indicators of language development before (from January 2017 to February 2020) and during (from March 2020 to December 2022) the pandemic. Our primary outcome was the proportion of children who required follow-up for language development by the Public Health Center. The secondary outcome was the proportion of children who could not say three or more meaningful words. We estimated risk ratios (RRs) and their 95% CIs, adjusted for potential confounders.

Results

The prevalence of the primary outcome was 33.5% before the pandemic and 36% during the pandemic. Compared with before the pandemic, increased RRs for the primary and secondary outcomes were observed during the pandemic, with RRs (95% CIs) of 1.09 (1.06–1.13) for the primary outcome and 1.11 (1.05–1.17) for the secondary outcome. Although the statistical interactions were not significant, the RRs were higher for children cared for at home than those in nursery schools and with ≤3 family members than those with ≥4 family members.

Conclusions

The COVID-19 pandemic was associated with an increased risk of impaired language development in children at 18 months. More extensive support is needed for higher risk families, as well as follow-up of long-term language development in children affected by the COVID-19 pandemic.

DOI： 10.1136/archdischild-2023-325926

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Roles of Oxidative Injury and Nitric Oxide System Derangements in Kawasaki Disease Pathogenesis: A Systematic Review. Reviewed International journal

Mitsuru Tsuge, Kazuhiro Uda, Takahiro Eitoku, Naomi Matsumoto, Takashi Yorifuji, Hirokazu Tsukahara

International journal of molecular sciences 24 ( 20 ) 2023.10

Language：English Publishing type：Research paper (scientific journal)

Kawasaki disease (KD) is an acute febrile vasculitis that occurs mostly in children younger than five years. KD involves multiple intricately connected inflammatory reactions activated by a cytokine cascade. Despite therapeutic advances, coronary artery damage may develop in some patients, who will be at risk of clinical cardiovascular events and even sudden death. The etiology of KD remains unclear; however, it may involve both genetic and environmental factors leading to aberrant inflammatory responses. Given the young age of onset, prenatal or perinatal exposure may be etiologically relevant. Multisystem inflammatory syndrome in children, a post-infectious hyper-inflammatory disorder associated with severe acute respiratory syndrome coronavirus 2, has features that overlap with those of KD. Available evidence indicates that vascular endothelial dysfunction is a critical step in the sequence of events leading to the development of cardiovascular lesions in KD. Oxidative stress and the dysregulation of the nitric oxide (NO) system contribute to the pathogenesis of inflammatory responses related to this disease. This review provides current evidence and concepts highlighting the adverse effects of oxidative injury and NO system derangements on the initiation and progression of KD and potential therapeutic strategies for cardiovascular pathologies in affected children.

DOI： 10.3390/ijms242015450

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Does Participation in the Setouchi Triennale Foster Social Capital? A Cross-Sectional Study Reviewed

Acta Medica Okayama 77 ( 5 ) 2023.10

Participation in the Setouchi Triennale and the Health of Residents in Naoshima: A Cross-sectional Study Reviewed

Acta Medica Okayama 77 ( 5 ) 2023.10

Childcare and Child Development in Japan Reviewed

Akiko Murata, Naomi Matsumoto, Chikara Miyaji, Soshi Takao, Takashi Yorifuji

Acta Medica Okayama 77 ( 5 ) 2023.10

Delivery room intubation and severe intraventricular hemorrhage in extremely preterm infants without low Apgar scores: A Japanese retrospective cohort study Reviewed

Kei Tamai, Naomi Matsumoto, Takashi Yorifuji, Akihito Takeuchi, Makoto Nakamura, Kazue Nakamura, Misao Kageyama

Scientific Reports 13 ( 1 ) 2023.9

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

The purpose of this study was to assess the associations between delivery room intubation (DRI) and severe intraventricular hemorrhage (IVH), as well as other neonatal outcomes, among extremely preterm infants without low Apgar scores using data from a large-scale neonatal registry data in Japan. We analyzed data for infants born at 24–27 gestational weeks between 2003 and 2019 in Japan using robust Poisson regression. Infants with low Apgar scores (≤ 1 at 1 min or ≤ 3 at 5 min) were excluded. The primary outcome was severe IVH. Secondary outcomes were other neonatal morbidities and mortality. The full cohort included 16,081 infants (intubation cohort, 13,367; no intubation cohort, 2714). The rate of DRI increased over time (78.6%, 2003–2008; 83.4%, 2009–2014; 87.8%, 2015–2019), while the rate of severe IVH decreased (7.1%, 2003–2008; 5.7%, 2009–2014; 5.3%, 2015–2019). Infants with DRI had a higher risk of severe IVH than those without DRI (6.8% vs. 2.3%; adjusted risk ratio, 1.86; 95% confidence interval, 1.33–2.58). The results did not change substantially when stratified by gestational age. Despite conflicting changes over time in DRI and severe IVH, DRI was associated with an increased risk of severe IVH among extremely preterm infants in Japan.

DOI： 10.1038/s41598-023-41010-x

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Other Link： https://www.nature.com/articles/s41598-023-41010-x

Antibody Titers After a Third and Fourth SARS-CoV-2 Vaccine Dose in Bizen City, Japan Reviewed

Tomoka Kadowaki, Ayako Sasaki, Naomi Matsumoto, Toshiharu Mitsuhashi, Soshi Takao, Takashi Yorifuji

Journal of Epidemiology 33 ( 9 ) 484 - 486 2023.9

Obesity, overweight, and severe prognosis in COVID-19 patients in Japan Reviewed

Tomoka Kadowaki, Naomi Matsumoto, Rumi Matsuo, Toshiharu Mitsuhashi, Ayako Sasaki, Soshi Takao, Takashi Yorifuji

Journal of Infection and Chemotherapy 2023.8

Effect of 2-week postpartum check-ups on screening positive for postpartum depression: a population-based cohort study using instrumental variable estimation in Japan Reviewed

Naoko Nakamura, Toshiharu Mitsuhashi, Yasuko Nakashima, Naomi Matsumoto, Takashi Yorifuji

Family Practice 2023.7

Publishing type：Research paper (scientific journal) Publisher：Oxford University Press (OUP)

Abstract

Background

Postpartum depression is experienced by approximately 10% of women and affects the health and development of their children. Although it is recommended that all mothers have the opportunity for early detection and intervention for postpartum depression, it is unclear whether early postpartum check-ups help to reduce postpartum depression.

Objective

The aim of this study was to assess the effect of 2-week postpartum check-ups on screening positive for postpartum depression in Japan.

Methods

This was a population-based cohort study that used the administrative database of Tsuyama, Japan. Participants were women who received postpartum home visits from a public health nurse in Tsuyama during the fiscal years 2017–2019. Data were obtained on participant’s attendance at a 2-week postpartum check-up and their responses on the Edinburgh Postpartum Depression Scale. Owing to the initiation of a publicly funded postpartum check-up programme, participants were pseudo-randomly assigned to receive/not receive a 2-week postpartum check-up. We conducted instrumental variable estimation to assess the causal effects of the check-up on screening positive for postpartum depression.

Results

The characteristics of the 1,382 participants did not differ by fiscal year of childbirth. We found a 6.7% (95% confidence interval 2.2–11.2) reduction in the prevalence of screening positive for postpartum depression as an effect of 2-week postpartum check-ups among women received 1-month postpartum home visits.

Conclusion

The results suggest that 2-week postpartum check-ups are effective in reducing the prevalence of screening positive for postpartum depression among 1-month postpartum women. Despite some limitations, early postpartum care could reduce postpartum depression.

DOI： 10.1093/fampra/cmad074

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Association between infant breastfeeding practices and timing of peak height velocity: A nationwide longitudinal survey in Japan Reviewed

Yousuke Higuchi, Naomi Matsumoto, Shintaro Fujiwara, Yuki Ebuchi, Mahoko Furujo, Kazue Nakamura, Toshihide Kubo, Takashi Yorifuji

Pediatric Research 2023.7

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Background

Several studies have discovered an association between infant feeding practices and puberty timing; however, most have involved female cohorts. We investigated the association between infant feeding practices and the timing of peak height velocity in boys and girls.

Methods

Data on infant feeding methods and anthropometric measurements were collected from a nationwide Japanese birth cohort study. The age at peak height velocity (APV, years) was estimated and compared. Subsequently, the effects of breastfeeding duration were analyzed.

Results

Of the 13,074 eligible participants, 650, 9455, and 2969 were formula-, mixed-, and exclusively breastfed, respectively. Among girls, the mean APV was significantly later in the mixed-fed (standardized regression coefficient (β): 0.094, 95% confidence interval (CI): 0.004–0.180) and exclusively breastfed (β: 0.150, 95% CI: 0.056–0.250) groups than in the formula-fed group. Among boys, the mean APV was not significantly different among the three groups; however, a sensitivity analysis that excluded preterm birth revealed more significantly delayed APV in the breastfed-only group compared to the formula-fed group. Furthermore, a multiple linear regression model revealed that a longer breastfeeding period was associated with later APV.

Conclusions

Infant breastfeeding practices can affect the timing of peak height velocity in both boys and girls.

Impact

Several studies have discovered an association between infant feeding practices and puberty timing; however, most have involved female cohorts. Age at peak height velocity, derived from longitudinal height measurements, is a useful marker of secondary sexual maturity milestones in boys and girls.

A Japanese birth cohort study revealed that breastfed children had a later age at peak height velocity than their formula-fed counterparts; this was more prominent among girls than boys.

Furthermore, a duration-effect relationship was observed, where longer breastfeeding duration was associated with a later age at peak height velocity.

DOI： 10.1038/s41390-023-02706-y

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Other Link： https://www.nature.com/articles/s41390-023-02706-y

Association between handwashing and gargling education for children and prevention of respiratory tract infections: a longitudinal Japanese children population-based study Reviewed

Kensuke Uraguchi, Toshiharu Mitsuhashi, Naomi Matsumoto, Soshi Takao, Seiichiro Makihara, Mizuo Ando, Takashi Yorifuji

European Journal of Pediatrics 2023.7

Evaluation of the association of birth order and group childcare attendance with Kawasaki disease using data from a nationwide longitudinal survey. Reviewed

Namba T, Takeuchi A, Matsumoto N, Tsuge M, Yashiro M, Tsukahara H, Yorifuji T

Front Pediatr. 11 1127053 - 1127053 2023.3

Association of Prehospital Physician Presence During Pediatric Out-of-Hospital Cardiac Arrest With Neurologic Outcomes. Reviewed International journal

Takafumi Obara, Tetsuya Yumoto, Tsuyoshi Nojima, Takashi Hongo, Kohei Tsukahara, Naomi Matsumoto, Takashi Yorifuji, Atsunori Nakao, Jonathan Elmer, Hiromichi Naito

Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies 2023.2

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVES: To examine the association of prehospital physician presence with neurologic outcomes of pediatric patients with out-of-hospital cardiac arrest (OHCA). DESIGN: Retrospective cohort study. SETTING: Data from the Japanese Association for Acute Medicine-OHCA Registry. INTERVENTIONS: None. PATIENTS: Pediatric patients (age 17 yr old or younger) registered in the database between June 2014 and December 2019. MEASUREMENT AND MAIN RESULTS: We used logistic regression models with stabilized inverse probability of treatment weighting (IPTW) to estimate the associated treatment effect of a prehospital physician with 1-month neurologically intact survival. Secondary outcomes included in-hospital return of spontaneous circulation (ROSC) and 1-month survival after OHCA. A total of 1,187 patients (276 in the physician presence group and 911 in the physician absence group) were included (median age 3 yr [interquartile range 0-14 yr]; 723 [61%] male). Comparison of the physician presence group, versus the physician absence, showed 1-month favorable neurologic outcomes of 8.3% (23/276) versus 3.6% (33/911). Physician presence was associated with greater odds of 1-month neurologically intact survival after stabilized IPTW adjustment (adjusted odds ratio [aOR] 1.98, 95% CI 1.08-3.66). We also found an association in the secondary outcome between physician presence, opposed to absence, and in-hospital ROSC (aOR 1.48, 95% CI 1.08-2.04). However, we failed to identify an association with 1-month survival (aOR 1.49, 95% CI 0.97-2.88). CONCLUSIONS: Among pediatric patients with OHCA, prehospital physician presence, compared with absence, was associated almost two-fold greater odds of 1-month favorable neurologic outcomes.

DOI： 10.1097/PCC.0000000000003206

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Frailty and all-cause and cause-specific mortality in Japan. Reviewed International journal

Rumi Matsuo, Naomi Matsumoto, Toshiharu Mitsuhashi, Soshi Takao, Takashi Yorifuji

Archives of gerontology and geriatrics 107 104906 - 104906 2022.12

Language：English Publishing type：Research paper (scientific journal)

BACKGROUND: In aging societies, there is an increasing focus on the concept of frailty. However, there is no consistent means to assess this concept. We assessed frailty using the Kihon Checklist (KCL), which is widely used in Japan, and examined the association between frailty and all-cause and cause-specific mortality in Japan, the most aged society in the world. METHODS: This was a retrospective cohort study, and we analyzed 43,312 participants aged ≥ 65 years who were enrolled in basic health checkups in Okayama City, Japan. We defined the frailty status of the participants using the KCL. To assess the association of frailty status with all-cause and cause-specific mortality, we used cause-specific Cox proportional hazard models to estimate hazard ratios (HRs), adjusting for individual potential confounders. Mean follow-up time was 9.3 years. RESULTS: The fully adjusted HR for all-cause mortality was 1.34 (95% confidence interval [CI]: 1.27-1.41) for the prefrail group and 2.22 (95% CI: 2.11-2.33) for the frail group. A similar pattern was observed for cardiovascular disease, respiratory disease, and cancer mortality. Younger people (65-74 years) and women tended to have higher effect estimates than older people (≥ 75 years) and men. CONCLUSION: Prefrailty and frailty can increase the risk of both all-cause and cause-specific mortality. Our study suggests that to support frail patients, it could be effective to focus on the prevention and management of cardiovascular and respiratory disease, and that the KCL may be useful as a method of screening for frailty.

DOI： 10.1016/j.archger.2022.104906

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Early childhood exposure to maternal smoking and obesity: A nationwide longitudinal survey in Japan Reviewed International journal

Miho Yamashita, Takashi Yorifuji, Naomi Matsumoto, Toshihide Kubo, Hirokazu Tsukahara

Clinical Obesity 13 ( 3 ) e12572 2022.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Wiley

Involuntary exposure to tobacco smoke is suspected to be one of the risks factors that are associated with obesity in children. The purpose of this study was to examine the relationship between early childhood exposure to tobacco smoke and the risk of obesity and overweight in Japan. This study utilized a nationwide, population-based longitudinal survey. The participants were restricted to 32 081 children who had available information on maternal smoking history as well as childhood height and weight. We conducted a binomial log-linear regression analysis with children of non-smoking mothers as the reference group. The children with mothers who were smokers had a higher risk of developing obesity or being overweight compared to the children with mothers who were nonsmokers. The risk ratios were 1.20 (95% confidence interval [CI]: 1.09-1.32) for overweight and 1.17 (95% CI: 0.95-1.44) for obesity. Early exposure to maternal smoking increases the risk of being overweight and having obesity during childhood. The increased risk is more pronounced among children with mothers, smoked heavily, or parents, who were smokers.

DOI： 10.1111/cob.12572

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Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/cob.12572

岡山市の新型コロナウイルス感染症の各流行期における症状及び重症度の比較に関する記述分析研究 Reviewed

松尾瑠美, 松本尚美, 門脇知花, 三橋利晴, 高尾総司, 頼藤貴志

岡山医学会雑誌 134 160 - 165 2022.12

Early-stage antibody kinetics after the third dose of BNT162b2 mRNA COVID-19 vaccination measured by a point-of-care fingertip whole blood testing Reviewed

Hideharu Hagiya, Yasuhiro Nakano, Masanori Furukawa, Naruhiko Sunada, Toru Hasegawa, Yasue Sakurada, Kou Hasegawa, Koichiro Yamamoto, Hiroko Ogawa, Takafumi Obara, Kouhei Ageta, Naomi Matsumoto, Rumi Matsuo, Tomoka Kadowaki, Akihito Higashikage, Takao Hikita, Takashi Yorifuji, Shinichi Toyooka, Yoshinobu Maeda, Yoshinori Yokokura, Fumio Otsuka, Masanori Nakayama

Scientific Reports 12 ( 1 ) 2022.11

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Amid the Coronavirus Disease 2019 pandemic, we aimed to demonstrate the accuracy of the fingertip whole blood sampling test (FWT) in measuring the antibody titer and uncovering its dynamics shortly after booster vaccination. Mokobio SARS-CoV-2 IgM & IgG Quantum Dot immunoassay (Mokobio Biotechnology R&D Center Inc., MD, USA) was used as a point-of-care FWT in 226 health care workers (HCWs) who had received two doses of the BNT162b2 mRNA vaccine (Pfizer-BioNTech) at least 8 months prior. Each participant tested their antibody titers before and after the third-dose booster up to 14-days. The effect of the booster was observed as early as the fourth day after vaccination, which exceeded the detection limit (> 30,000 U/mL) by 2.3% on the fifth day, 12.2% on the sixth day, and 22.5% after the seventh day. Significant positive correlations were observed between the pre- and post-vaccination (the seventh and eighth days) antibody titers (correlation coefficient, 0.405; p < 0.001). FWT is useful for examining antibody titers as a point-of-care test. Rapid response of antibody titer started as early as the fourth day post-vaccination, while the presence of weak responders to BNT162b2 vaccine was indicated.

DOI： 10.1038/s41598-022-24464-3

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Other Link： https://www.nature.com/articles/s41598-022-24464-3

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Papers - MATSUMOTO Naomi