タイトル(別表記) What should we adjust in multiple regression models? : Biases in observational studies
著者 頼藤 貴志|
キーワード 疫学 臨床研究 観察研究 交絡要因 交絡バイアス
出版物タイトル 岡山医学会雑誌
発行日 2020-04-01
132巻
1号
開始ページ 18
終了ページ 24
ISSN 0030-1558
関連URL isVersionOf https://doi.org/10.4044/joma.132.18
言語 Japanese
著作権者 Copyright (c) 2020 岡山医学会
論文のバージョン publisher
DOI 10.4044/joma.132.18
NAID 130007840320
著者 Naitou, Hiromichi| Yumoto, Tetsuya| Yorifuji, Takashi| Tahara, Yoshio| Yonemoto, Naohiro| Nonogi, Hiroshi| Nagao, Ken| Takanori Ikeda| Sato, Naoki| Tsutsui, Hiroyuki|
キーワード Paramedic Prehospital Emergency medical services Cardiopulmonary resuscitation Advanced life support
備考 This fulltext is available in May 2021.|
発行日 2020-05-15
出版物タイトル Resuscitation
153巻
出版者 Elsevier
開始ページ 251
終了ページ 257
ISSN 0300-9572
NCID AA00817253
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン author
PubMed ID 32422240
DOI 10.1016/j.resuscitation.2020.05.007
関連URL isVersionOf https://doi.org/10.1016/j.resuscitation.2020.05.007
フルテキストURL fulltext.pdf
著者 Yorifuji, Takashi|
キーワード environment and public health epidemiology food contamination methylmercury compounds Minamata disease
発行日 2020-01-05
出版物タイトル Journal of Epidemiology
30巻
1号
出版者 Japan Epidemiological Association
開始ページ 12
終了ページ 14
ISSN 0917-5040
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © 2019 Takashi Yorifuji.
論文のバージョン publisher
PubMed ID 31685724
DOI 10.2188/jea.JE20190089
Web of Science KeyUT 000502630300003
関連URL isVersionOf https://doi.org/10.2188/jea.JE20190089
フルテキストURL fulltext.pdf
著者 Yumoto, Tetsuya| Naitou, Hiromichi| Ihoriya, Hiromi| Yorifuji, Takashi| Nakao, Atsunori|
発行日 2019-01-29
出版物タイトル PLoS ONE
14巻
1号
出版者 Public Library of Science
開始ページ e0207049
ISSN 1932-6203
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © 2019 Yumoto et al.
論文のバージョン publisher
PubMed ID 30695039
DOI 10.1371/journal.pone.0207049
Web of Science KeyUT 000457046400004
関連URL isVersionOf https://doi.org/10.1371/journal.pone.0207049
フルテキストURL fulltext.pdf
著者 Yumoto, Tetsuya| Naitou, Hiromichi| Yorifuji, Takashi| Aokage, Toshiyuki| Fujisaki, Noritomo| Nakao, Atsunori|
キーワード Glasgow coma scale Japan Coma Scale Mortality Trauma Traumatic brain injury
発行日 2019-11-06
出版物タイトル BMC Emergency Medicine
19巻
1号
出版者 BMC
開始ページ 65
ISSN 1471-227X
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © The Author(s). 2019
論文のバージョン publisher
PubMed ID 31694575
DOI 10.1186/s12873-019-0282-x
Web of Science KeyUT 000495573700001
関連URL isVersionOf https://doi.org/10.1186/s12873-019-0282-x
フルテキストURL fulltext.pdf
著者 Yumoto, Tetsuya| Naitou, Hiromichi| Yorifuji, Takashi| Tahara, Yoshio| Yonemoto, Naohiro| Nonogi, Hiroshi| Nagao, Ken| Ikeda, Takanori| Sato, Naoki| Tsutsui, Hiroyuki|
キーワード out-of-hospital cardiac arrest outcome national meeting cardiopulmonary resuscitation
発行日 2019-12-16
出版物タイトル International Journal of Environmental Research and Public Health
16巻
24号
出版者 MDPI
開始ページ 5130
ISSN 1661-7827
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © 2019 by the authors.
論文のバージョン publisher
PubMed ID 31888125
DOI 10.3390/ijerph16245130
Web of Science KeyUT 000507312700245
関連URL isVersionOf https://doi.org/10.3390/ijerph16245130
フルテキストURL fulltext.pdf
著者 Knaup, Emily| Nosaka, Nobuyuki| Yorifuji, Takashi| Tsukahara, Kohei| Naitou, Hiromichi| Tsukahara, Hirokazu| Nakao, Atsunori| the JaRPAC Study Group|
キーワード Decision support Intensive care Length of stay Mortality Outcome Pediatric Risk Prediction rules Scoring system
発行日 2019-07-29
出版物タイトル Journal of Intensive Care
7巻
出版者 BMC
開始ページ 38
ISSN 2052-0492
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © The Author(s).
論文のバージョン publisher
PubMed ID 31384469
DOI 10.1186/s40560-019-0392-2
Web of Science KeyUT 000477892900001
関連URL isVersionOf https://doi.org/10.1186/s40560-019-0392-2
フルテキストURL JE29_4_123.pdf
著者 Yorifuji, Takashi|
キーワード dietary supplements folic acid fortification of the food supply long-term trend neural tube defects spina bifida
発行日 2018-09-15
出版物タイトル Journal of Epidemiology
29巻
4号
出版者 Japan Epidemiological Association
開始ページ 123
終了ページ 124
ISSN 0917-5040
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 © 2018 Takashi Yorifuji.
論文のバージョン publisher
PubMed ID 30224581
DOI 10.2188/jea.JE20180126
Web of Science KeyUT 000461011300001
関連URL isVersionOf https://doi.org/10.2188/jea.JE20180126
フルテキストURL AEOH74_5_271.pdf fig1-2.pdf fig3.pdf table.pdf
著者 Yorifuji, Takashi| Kashima, Saori| Made Ayu Hitapretiwi Suryadhi| Abudureyimu, Kawuli|
キーワード Air pollution Cardiovascular disease Epidemiology Respiratory disease Yokkaichi Asthma sulfur dioxide
発行日 2018-02-20
出版物タイトル Archives of Environmental and Occupational Health
74巻
5号
出版者 ROUTLEDGE JOURNALS, TAYLOR & FRANCIS
開始ページ 271
終了ページ 278
ISSN 1933-8244
NCID AA12150469
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン author
PubMed ID 29384437
DOI 10.1080/19338244.2018.1434474
Web of Science KeyUT 000482943000006
関連URL isVersionOf https://doi.org/10.1080/19338244.2018.1434474
著者 Yorifuji, Takashi| Tsukahara, Hirokazu| Doi, Hiroyuki|
キーワード Early childhood exposure Epidemiology Mucocutaneous lymph node syndrome; Smoking
備考 This fulltext will be available in Nov 2020|
発行日 2019-03-10
出版物タイトル Science of The Total Environment
655巻
出版者 Elsevier
開始ページ 141
終了ページ 146
ISSN 00489697
NCID AA00836666
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
論文のバージョン author
PubMed ID 30469059
DOI 10.1016/j.scitotenv.2018.11.194
Web of Science KeyUT 000455034600013
関連URL isVersionOf https://doi.org/10.1016/j.scitotenv.2018.11.194
著者 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|
発行日 2014-12
出版物タイトル Resuscitation
85巻
12号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/AMO/51865
フルテキストURL 67_5_293.pdf
著者 Takeuchi, Akihito| Ogino, Tatsuya| Hanafusa, Kaoru| Morooka, Teruko| Oka, Makio| Yorifuji, Takashi| Ohtsuka, Yoko|
抄録 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.
キーワード attention deficit/hyperactivity disorder pervasive developmental disorder executive function working memory color-word matching Stroop task
Amo Type Original Article
発行日 2013-10
出版物タイトル Acta Medica Okayama
67巻
5号
出版者 Okayama University Medical School
開始ページ 293
終了ページ 303
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2013 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 24145729
Web of Science KeyUT 000325836100003
関連URL http://ousar.lib.okayama-u.ac.jp/metadata/52244
JaLCDOI 10.18926/AMO/49040
フルテキストURL 66_6_443.pdf
著者 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|
抄録 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.
キーワード hemodialysis recirculation clearance gap vascular access percutaneous transluminal angioplasty
Amo Type Original Article
発行日 2012-12
出版物タイトル Acta Medica Okayama
66巻
6号
出版者 Okayama University Medical School
開始ページ 443
終了ページ 447
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2012 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 23254578
Web of Science KeyUT 000312966100003
著者 Yorifuji, Takashi| Tsuda, Toshihide| Inoue, Sachiko| Takao, Soshi| Harada, Masazumi|
発行日 2011-07
出版物タイトル Environment International
37巻
5号
資料タイプ 学術雑誌論文
JaLCDOI 10.18926/AMO/45268
フルテキストURL 65_2_97.pdf
著者 Tsuchihashi, Yuuki| Yorifuji, Takashi| Takao, Soshi| Suzuki, Etsuji| Mori, Shigeru| Doi, Hiroyuki| Tsuda, Toshihide|
抄録 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.
キーワード seasonal influenza in humans temperature humidity case-crossover study
Amo Type Original Article
発行日 2011-04
出版物タイトル Acta Medica Okayama
65巻
2号
出版者 Okayama University Medical School
開始ページ 97
終了ページ 103
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 CopyrightⒸ 2011 by Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 21519367
Web of Science KeyUT 000289818800005
JaLCDOI 10.18926/AMO/40009
フルテキストURL 64_3_171.pdf
著者 Kodama, Tomoe| Nakase, Katsumi| Tsuda, Toshihide| Yorifuji, Takashi| Doi, Hiroyuki|
抄録 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.
キーワード sexually transmitted infections patient care management human immunodeficiency virus testing physician
Amo Type Original Article
発行日 2010-06
出版物タイトル Acta Medica Okayama
64巻
3号
出版者 Okayama University Medical School
開始ページ 171
終了ページ 179
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
著作権者 Okayama University Medical School
論文のバージョン publisher
査読 有り
PubMed ID 20596128
Web of Science KeyUT 000279094300003
JaLCDOI 10.18926/AMO/32854
フルテキストURL fulltext.pdf
著者 Sasaki, Ayako| Yorifuji, Takashi| Iwase, Toshihide| Komatsu, Hirokazu| Takao, Soshi| Doi, Hiroyuki|
抄録 <p>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 &#34;less than 2h&#34; 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.</p>
キーワード TV viewing obesity preschool children
Amo Type Original Article
発行日 2010-04
出版物タイトル Acta Medica Okayama
64巻
2号
出版者 Okayama University Medical School
開始ページ 137
終了ページ 142
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 20424669
Web of Science KeyUT 000276996900008
JaLCDOI 10.18926/AMO/31853
フルテキストURL fulltext.pdf
著者 Komatsu, Hirokazu| Yorifuji, Takashi| Iwase, Toshihide| Sasaki, Ayako| Takao, Soshi| Doi, Hiroyuki|
抄録 <p>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.</p>
キーワード breastfeeding overweight preschool children
Amo Type Original Article
発行日 2009-02
出版物タイトル Acta Medica Okayama
63巻
1号
出版者 Okayama University Medical School
開始ページ 49
終了ページ 55
ISSN 0386-300X
NCID AA00508441
資料タイプ 学術雑誌論文
言語 English
論文のバージョン publisher
査読 有り
PubMed ID 19247416
Web of Science KeyUT 000263730300007
著者 賴藤 貴志|
発行日 2007-03-23
出版物タイトル
資料タイプ 学位論文