JaLCDOI 10.18926/AMO/31853
FullText URL fulltext.pdf
Author Komatsu, Hirokazu| Yorifuji, Takashi| Iwase, Toshihide| Sasaki, Ayako| Takao, Soshi| Doi, Hiroyuki|
Abstract

To investigate the effect of exclusive breastfeeding on the likelihood of Japanese preschool children being overweight, population-based cross-sectional survey data from M town in Japan were used. Using the population registry of this town, all 616 preschool children were identified, and a self-administered questionnaire was sent to their parents. The exposure variable of interest was exclusive breastfeeding from birth to 6 months, and the outcome variable of interest was the children being overweight at preschool age. Statistical analyses used included logistic regression and sensitivity analyses. In the final analyses, we included 448 preschool children. Although all point estimates indicated a protective effect, logistic regression analyses showed no significant reduction in being overweight due to exclusive breastfeeding in the unadjusted model (odds ratio (OR)0.70, 95% confidence intervals:0.30-1.64), the model adjusted for birth weight (OR0.70, 95% CI:0.30-1.63), the model adjusted for child lifestyle (OR0.71, 95% CI:0.30-1.67), or the model adjusted for parental factors (OR0.46, 95% CI:0.15-1.37). In sensitivity analyses, point estimates were not significant, but a protective effect was observed. In conclusion, our results suggest that breastfeeding might have a protective effect on Japanese preschool children against being overweight, although statistical significance was not observed due to the limitation of the statistical power of the findings.

Keywords breastfeeding overweight preschool children
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2009-02
Volume volume63
Issue issue1
Publisher Okayama University Medical School
Start Page 49
End Page 55
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
File Version publisher
Refereed True
PubMed ID 19247416
Web of Science KeyUT 000263730300007
JaLCDOI 10.18926/AMO/32854
FullText URL fulltext.pdf
Author Sasaki, Ayako| Yorifuji, Takashi| Iwase, Toshihide| Komatsu, Hirokazu| Takao, Soshi| Doi, Hiroyuki|
Abstract

Obesity in children is a serious public health problem, and TV viewing is considered a potential risk factor. Since, however, no relevant association studies have been conducted in Japan, we evaluated the association between TV viewing and obesity using a population-based study conducted in a Japanese town. All 616 preschool children in the town were enrolled in February 2008, and a self-administered questionnaire to collect children's and parents' characteristics was sent to the parents. We dichotomized the time spent TV viewing and evaluated associations by logistic regression using a "less than 2h" category as a reference. The questionnaire was collected from 476 participants (77.3%), of whom 449 were available for the final analyses. Among them, 26.9% of preschool children reported 2 or more hours of TV viewing per day and 8.2% were defined as obese. In logistic regression analyses, there was no positive association in unadjusted (odds ratio [OR]1.11, 95% confidence interval [95% CI]:0.50-2.49) or adjusted models for exclusively breastfed status, sleep duration, or maternal factors (OR1.11, 95% CI:0.50-2.51). We also found no positive association between TV viewing and overweight status, possibly owing to the influence of social environment, low statistical power, or misclassification.

Keywords TV viewing obesity preschool children
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2010-04
Volume volume64
Issue issue2
Publisher Okayama University Medical School
Start Page 137
End Page 142
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
File Version publisher
Refereed True
PubMed ID 20424669
Web of Science KeyUT 000276996900008
JaLCDOI 10.18926/AMO/40009
FullText URL 64_3_171.pdf
Author Kodama, Tomoe| Nakase, Katsumi| Tsuda, Toshihide| Yorifuji, Takashi| Doi, Hiroyuki|
Abstract Physicians should educate patients with sexually transmitted infections (STIs) on measures to prevent reinfection and should also undertake human immunodeficiency virus (HIV) testing after diagnosis of STIs. These preventive measures are important, but it is not known to what extent these procedures are followed in Japan. We conducted a cross-sectional study to investigate the proportion of patients with STIs who received appropriate management from physicians, namely recommendation of HIV testing, encouragement of condom use and examination and/or treatment of sexual partners, to elucidate the factors affecting institution of each measure. From a mailshot of 566 physicians, 409 (72.3%) responded, with 176 diagnosing an STI in 967 patients. The proportions applying the 3 measures were low (recommendation of HIV testing:27.0;encouragement of condom use:64.8%;examination of sexual partners:17.5%), and were related to the sex of the patients and numbers of patients diagnosed by the physicians. Female patients received better care than male patients, particularly with respect to recommendation of HIV testing (odds ratio:2.82). Physicians who diagnosed more than 20 STI patients tended not to provide appropriate management. These findings suggest the necessity for better physician management of patients for effective prevention of STIs.
Keywords sexually transmitted infections patient care management human immunodeficiency virus testing physician
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2010-06
Volume volume64
Issue issue3
Publisher Okayama University Medical School
Start Page 171
End Page 179
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 20596128
Web of Science KeyUT 000279094300003
JaLCDOI 10.18926/AMO/45268
FullText URL 65_2_97.pdf
Author Tsuchihashi, Yuuki| Yorifuji, Takashi| Takao, Soshi| Suzuki, Etsuji| Mori, Shigeru| Doi, Hiroyuki| Tsuda, Toshihide|
Abstract Seasonal influenza infection is a major challenge in public health. The term "seasonal influenza" refers to the typical increase in the number of influenza patients in the winter season in temperature zones. However, it is not clear how environmental factors within a single flu season affect influenza infection in a human population. Therefore, we evaluated the effects of temperature and humidity in the 2006-7 flu season on the onset of seasonal influenza using a case-crossover study. We targeted patients who attended one pediatric clinic in Okayama city, Japan and who were diagnosed as being infected with the seasonal influenza virus. Using 2 references (time-stratified and symmetric bidirectional design), we estimated the effects of average temperature and relative humidity from the onset day (lag0) to 10 days before (lag10). The total number of subjects was 419, and their onset days ranged from 26 December 2006 to 30 April 2007. While the onset was significantly associated with lower temperature, relative humidity was not related. In particular, temperatures before the 3-day incubation period had higher-magnitude odds ratios. For example, the odds ratio and 95% confidence interval for average temperature at time lag 8 was 1.12 (1.08-1.17) per 1.0℃ decrease. Low environmental temperature significantly increased the risk of seasonal influenza onset within the 2006-7 winter season.
Keywords seasonal influenza in humans temperature humidity case-crossover study
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2011-04
Volume volume65
Issue issue2
Publisher Okayama University Medical School
Start Page 97
End Page 103
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders CopyrightⒸ 2011 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 21519367
Web of Science KeyUT 000289818800005
JaLCDOI 10.18926/AMO/49040
FullText URL 66_6_443.pdf
Author Ugawa, Toyomu| Sakurama, Kazufumi| Yorifuji, Takashi| Takaoka, Munenori| Fujiwara, Yasuhiro| Kabashima, Narutoshi| Azuma, Daisuke| Hirayama, Takahiro| Tsukahara, Kohei| Morisada, Sunao| Iida, Atsuyoshi| Tada, Keitaro| Shiba, Naoki| Sato, Nobuo| Ichiba, Shingo| Kino, Koichi| Fukushima, Masaki| Ujike, Yoshihito|
Abstract The functioning of an arteriovenous fistula (AVF) used for vascular access during hemodialysis has been assessed mainly by dilution methods. Although these techniques indicate the immediate recirculation rate, the results obtained may not correlate with Kt/V. In contrast, the clearance gap (CL-Gap) method provides the total recirculation rate per dialysis session and correlates well with Kt/V. We assessed the correlation between Kt/V and CL-Gap as well as the change in radial artery (RA) blood flow speed in the fistula before percutaneous transluminal angioplasty (PTA) in 45 patients undergoing continuous hemodialysis. The dialysis dose during the determination of CL-Gap was 1.2 to 1.4 Kt/V. Patients with a 10% elevation or more than a 10% relative increase in CL-Gap underwent PTA (n=45), and the values obtained for Kt/V and CL-Gap before PTA were compared with those obtained immediately afterward. The mean RA blood flow speed improved significantly (from 52.9 to 97.5cm/sec) after PTA, as did Kt/V (1.07 to 1.30) and CL-Gap (14.1% to -0.2%). A significant correlation between these differences was apparent (r=-0.436 and p=0.003). These findings suggest that calculating CL-Gap may be useful for determining when PTA is required and for assessing the effectiveness of PTA, toward obtaining better dialysis.
Keywords hemodialysis recirculation clearance gap vascular access percutaneous transluminal angioplasty
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2012-12
Volume volume66
Issue issue6
Publisher Okayama University Medical School
Start Page 443
End Page 447
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders CopyrightⒸ 2012 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 23254578
Web of Science KeyUT 000312966100003
JaLCDOI 10.18926/AMO/51865
FullText URL 67_5_293.pdf
Author Takeuchi, Akihito| Ogino, Tatsuya| Hanafusa, Kaoru| Morooka, Teruko| Oka, Makio| Yorifuji, Takashi| Ohtsuka, Yoko|
Abstract To clarify the relationship between attention deficit/hyperactivity disorder (AD/HD) and pervasive developmental disorders (PDD), we investigated the common features and differences of these disorders in neuropsychological profiles. The subjects were 4 groups of Japanese boys aged 6 to 15 years, categorized by diagnosis:AD/HD (n=20), PDD with comorbid AD/HD (PDD+:n=16), PDD without comorbid AD/HD (PDD-:n=8), and typically developing (n=60). We evaluated executive function (EF) through verbal and visuospatial memory tasks, the Go/NoGo task, and the color-word matching Stroop task. We performed a categorical analysis to estimate the effects of the 3 disorders on EF and a dimensional analysis to estimate the effects of symptom scales on EF. We found that the AD/HD and PDD+ subjects had negative effects on verbal working memory and intra-individual response variability. The severity of these impairments was positively correlated with the inattentiveness score. The subjects with a PDD+ or PDD- diagnosis had poorer scores on interference control;the severity of this impairment was correlated with the PDD symptom score. Impairments in visuospatial working memory were detected in the AD/HD and PDD- groups but not in the PDD+ group. Impairments in inhibition of the pre-potent response were noted in all 3 categories. AD/HD and PDD share neuropsychological features, though each disorder has a specific impairment pattern. Our findings partially support the idea that AD/HD and PDD are on a spectrum.
Keywords attention deficit/hyperactivity disorder pervasive developmental disorder executive function working memory color-word matching Stroop task
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2013-10
Volume volume67
Issue issue5
Publisher Okayama University Medical School
Start Page 293
End Page 303
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders CopyrightⒸ 2013 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 24145729
Web of Science KeyUT 000325836100003
Related Url http://ousar.lib.okayama-u.ac.jp/metadata/52244
JaLCDOI 10.18926/AMO/60365
FullText URL 74_4_285.pdf
Author Tsukahara, Kohei| Naitou, Hiromichi| Yorifuji, Takashi| Nosaka, Nobuyuki| Yamamoto, Hirotsugu| Osako, Takaaki| Nakao, Atsunori| the JaRPAC Study Group|
Abstract The importance of centralizing treatment services for severely ill children has been well established, but such entralization remains difficult in Japan. We aimed to compare the trauma and illness severity and mortality of children admitted to two common types of ICUs for children. According to the type of management and disposition of the medical provider, we classified ICUs as pediatric ICUs [PICUs] or general ICUs, and analyzed differences in endogenous and exogenous illness settings between them. Overall, 1,333 pediatric patients were included, with 1,143 patients admitted to PICUs and 190 patients to general ICUs. The Pediatric Cerebral Performance Category score (PCPC) at discharge was significantly lower in the PICU group (adjusted OR: 0.45; 95%CI: 0.23-0.88). Death and unfavorable neurological outcomes occurred less often in the PICU group (adjusted OR: 0.29; 95%CI: 0.14-0.60). However, when limited to exogenous illness, PCPC scores (adjusted OR: 0.38; 95%CI: 0.07-1.99) or death/unfavorable outcomes (adjusted OR: 0.72; 95%CI: 0.08-6.34) did not differ between the groups. PCPC deterioration and overall sequelae/death rates were lower in PICUs for children with endogenous illnesses, although the outcomes of exogenous illness were similar between the 2 unit types. Further studies on the necessity of centralization are warranted.
Keywords kids critical care mortality morbidity centralization
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2020-08
Volume volume74
Issue issue4
Publisher Okayama University Medical School
Start Page 285
End Page 291
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders CopyrightⒸ 2020 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 32843759
Web of Science KeyUT 000562508700003
NAID 120006880204
JaLCDOI 10.18926/AMO/61210
FullText URL 74_6_513.pdf
Author Ageta, Kohei| Naito, Hiromichi| Yorifuji, Takashi| Obara, Takafumi| Nojima, Tsuyoshi| Yamada, Taihei| Tsukahara, Kohei| Yakushiji, Hiromasa| Nakao, Atsunori|
Abstract Few studies have investigated the influence of the Coronavirus Disease 2019 (COVID-19) pandemic on emer-gency medical service (EMS) systems, especially in areas less affected or unaffected by COVID-19. In this study, we investigated changes in prehospital EMS activity and transport times during the COVID-19 pandemic. All patients transported by EMS in the city of Okayama from March–May 2019 or March–May 2020 were included. Interfacility transports were excluded. The primary outcome was the time from a patient’s first emergency call until hospital arrival (total prehospital time). Secondary outcomes included three segments of total prehospital time: the response time, on-scene time, and transportation time. Total prehospital time and the durations of each segment were compared between corresponding months in 2020 (COVID19-affected) and 2019 (control). The results showed that total prehospital times in April 2020 were significantly higher than those in 2019 (33.8 ± 11.6 vs. 32.2 ± 10.8 min, p < 0.001). Increases in total prehospital time were caused by longer response time (9.3 ± 3.8 vs. 8.7 ± 3.7 min, p < 0.001) and on-scene time (14.4 ± 7.9 vs. 13.5 ± 6.2min, p < 0.001). The COVID-19 pandemic was thus shown to affect EMS and delayed arrival/response even in a minimally affected region. A system to minimize transportation delays should be developed for emerging pandemics.
Keywords emergency medical services health care system emergency transport coronavirus infection
Amo Type Original Article
Publication Title Acta Medica Okayama
Published Date 2020-12
Volume volume74
Issue issue6
Publisher Okayama University Medical School
Start Page 513
End Page 520
ISSN 0386-300X
NCID AA00508441
Content Type Journal Article
language English
Copyright Holders CopyrightⒸ 2020 by Okayama University Medical School
File Version publisher
Refereed True
PubMed ID 33361871
Web of Science KeyUT 000601203600007
NAID 120006948949
Author Yorifuji, Takashi|
Published Date 2007-03-23
Publication Title
Content Type Thesis or Dissertation
Author Yorifuji, Takashi| Tsuda, Toshihide| Inoue, Sachiko| Takao, Soshi| Harada, Masazumi|
Published Date 2011-07
Publication Title Environment International
Volume volume37
Issue issue5
Content Type Journal Article
Author Takeda, Yoshimasa| Kawashima, Takahisa| Kiyota, Kazuya| Oda, Shigeto| Morimoto, Naoki| Kobata, Hitoshi| Isobe, Hisashi| Honda, Mitsuru| Fujimi, Satoshi| Onda, Jun| I, Seishi| Sakamoto, Tetsuya| Ishikawa, Masami| Nakano, Hiroshi| Sadamitsu, Daikai| Kishikawa, Masanobu| Kinoshita, Kosaku| Yokoyama, Tomoharu| Harada, Masahiro| Kitaura, Michio| Ichihara, Kiyoshi| Hashimoto, Hiroshi| Tsuji, Hidekazu| Yorifuji, Takashi| Nagano, Osamu| Katayama, Hiroshi| Ujike, Yoshihito| Morita, Kiyoshi|
Published Date 2014-12
Publication Title Resuscitation
Volume volume85
Issue issue12
Content Type Journal Article
FullText URL SciTotalEnviron_201811194.pdf
Author Yorifuji, Takashi| Tsukahara, Hirokazu| Doi, Hiroyuki|
Keywords Early childhood exposure Epidemiology Mucocutaneous lymph node syndrome; Smoking
Published Date 2019-03-10
Publication Title Science of The Total Environment
Volume volume655
Publisher Elsevier
Start Page 141
End Page 146
ISSN 00489697
NCID AA00836666
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
File Version author
PubMed ID 30469059
DOI 10.1016/j.scitotenv.2018.11.194
Web of Science KeyUT 000455034600013
Related Url isVersionOf https://doi.org/10.1016/j.scitotenv.2018.11.194
FullText URL AEOH74_5_271.pdf fig1-2.pdf fig3.pdf table.pdf
Author Yorifuji, Takashi| Kashima, Saori| Made Ayu Hitapretiwi Suryadhi| Abudureyimu, Kawuli|
Keywords Air pollution Cardiovascular disease Epidemiology Respiratory disease Yokkaichi Asthma sulfur dioxide
Published Date 2018-02-20
Publication Title Archives of Environmental and Occupational Health
Volume volume74
Issue issue5
Publisher ROUTLEDGE JOURNALS, TAYLOR & FRANCIS
Start Page 271
End Page 278
ISSN 1933-8244
NCID AA12150469
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
File Version author
PubMed ID 29384437
DOI 10.1080/19338244.2018.1434474
Web of Science KeyUT 000482943000006
Related Url isVersionOf https://doi.org/10.1080/19338244.2018.1434474
FullText URL JE29_4_123.pdf
Author Yorifuji, Takashi|
Keywords dietary supplements folic acid fortification of the food supply long-term trend neural tube defects spina bifida
Published Date 2018-09-15
Publication Title Journal of Epidemiology
Volume volume29
Issue issue4
Publisher Japan Epidemiological Association
Start Page 123
End Page 124
ISSN 0917-5040
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © 2018 Takashi Yorifuji.
File Version publisher
PubMed ID 30224581
DOI 10.2188/jea.JE20180126
Web of Science KeyUT 000461011300001
Related Url isVersionOf https://doi.org/10.2188/jea.JE20180126
FullText URL fulltext.pdf
Author Knaup, Emily| Nosaka, Nobuyuki| Yorifuji, Takashi| Tsukahara, Kohei| Naitou, Hiromichi| Tsukahara, Hirokazu| Nakao, Atsunori| the JaRPAC Study Group|
Keywords Decision support Intensive care Length of stay Mortality Outcome Pediatric Risk Prediction rules Scoring system
Published Date 2019-07-29
Publication Title Journal of Intensive Care
Volume volume7
Publisher BMC
Start Page 38
ISSN 2052-0492
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © The Author(s).
File Version publisher
PubMed ID 31384469
DOI 10.1186/s40560-019-0392-2
Web of Science KeyUT 000477892900001
Related Url isVersionOf https://doi.org/10.1186/s40560-019-0392-2
FullText URL fulltext.pdf
Author Yumoto, Tetsuya| Naitou, Hiromichi| Yorifuji, Takashi| Tahara, Yoshio| Yonemoto, Naohiro| Nonogi, Hiroshi| Nagao, Ken| Ikeda, Takanori| Sato, Naoki| Tsutsui, Hiroyuki|
Keywords out-of-hospital cardiac arrest outcome national meeting cardiopulmonary resuscitation
Published Date 2019-12-16
Publication Title International Journal of Environmental Research and Public Health
Volume volume16
Issue issue24
Publisher MDPI
Start Page 5130
ISSN 1661-7827
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © 2019 by the authors.
File Version publisher
PubMed ID 31888125
DOI 10.3390/ijerph16245130
Web of Science KeyUT 000507312700245
Related Url isVersionOf https://doi.org/10.3390/ijerph16245130
FullText URL fulltext.pdf
Author Yumoto, Tetsuya| Naitou, Hiromichi| Yorifuji, Takashi| Aokage, Toshiyuki| Fujisaki, Noritomo| Nakao, Atsunori|
Keywords Glasgow coma scale Japan Coma Scale Mortality Trauma Traumatic brain injury
Published Date 2019-11-06
Publication Title BMC Emergency Medicine
Volume volume19
Issue issue1
Publisher BMC
Start Page 65
ISSN 1471-227X
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © The Author(s). 2019
File Version publisher
PubMed ID 31694575
DOI 10.1186/s12873-019-0282-x
Web of Science KeyUT 000495573700001
Related Url isVersionOf https://doi.org/10.1186/s12873-019-0282-x
FullText URL fulltext.pdf
Author Yumoto, Tetsuya| Naitou, Hiromichi| Ihoriya, Hiromi| Yorifuji, Takashi| Nakao, Atsunori|
Published Date 2019-01-29
Publication Title PLoS ONE
Volume volume14
Issue issue1
Publisher Public Library of Science
Start Page e0207049
ISSN 1932-6203
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © 2019 Yumoto et al.
File Version publisher
PubMed ID 30695039
DOI 10.1371/journal.pone.0207049
Web of Science KeyUT 000457046400004
Related Url isVersionOf https://doi.org/10.1371/journal.pone.0207049
FullText URL fulltext.pdf
Author Yorifuji, Takashi|
Keywords environment and public health epidemiology food contamination methylmercury compounds Minamata disease
Published Date 2020-01-05
Publication Title Journal of Epidemiology
Volume volume30
Issue issue1
Publisher Japan Epidemiological Association
Start Page 12
End Page 14
ISSN 0917-5040
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
Copyright Holders © 2019 Takashi Yorifuji.
File Version publisher
PubMed ID 31685724
DOI 10.2188/jea.JE20190089
Web of Science KeyUT 000502630300003
Related Url isVersionOf https://doi.org/10.2188/jea.JE20190089
FullText URL fulltext.pdf
Author Naitou, Hiromichi| Yumoto, Tetsuya| Yorifuji, Takashi| Tahara, Yoshio| Yonemoto, Naohiro| Nonogi, Hiroshi| Nagao, Ken| Ikeda, Takanori| Sato, Naoki| Tsutsui, Hiroyuki|
Keywords Paramedic Prehospital Emergency medical services Cardiopulmonary resuscitation Advanced life support
Note This fulltext is available in May 2021.|
Published Date 2020-05-15
Publication Title Resuscitation
Volume volume153
Publisher Elsevier
Start Page 251
End Page 257
ISSN 0300-9572
NCID AA00817253
Content Type Journal Article
language English
OAI-PMH Set 岡山大学
File Version author
PubMed ID 32422240
DOI 10.1016/j.resuscitation.2020.05.007
Related Url isVersionOf https://doi.org/10.1016/j.resuscitation.2020.05.007