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Featured researches published by Koji Tsuboi.


Psycho-oncology | 1999

Development of quality of life questionnaire in Japan: quality of life assessment of cancer patients receiving chemotherapy.

Minoru Kurihara; Hiroyuki Shimizu; Koji Tsuboi; Kunihiko Kobayashi; Minoru Murakami; Kenji Eguchi; Kojiro Shimozuma

The Japanese Quality of Life Research Group has developed a general questionnaire suitable for assessing the Quality of Life (QOL) in patients undergoing chemotherapy. The questionnaire covers four major categories: (1) daily activities, (2) physical condition, (3) social activities, and (4) mental and psychological status. The State–Trait Anxiety Inventory (STAI), Self‐Rating Depression Scale (SDS), and Performance Status (PS) were used as external measures of quality of life and for the validation of our tool. On the basis of two basic surveys and two studies we selected 22 questions from a larger set of items. Validity and reliability were verified for the final 22‐question form. This questionnaire, named the QOL Questionnaire for Cancer Patients Treated with Anticancer Drugs (QOL‐ACD), can be used to detect changes in QOL over time. Its use as an additional outcome measure in Phase III chemotherapy trials should be encouraged. Copyright


Biopsychosocial Medicine | 2008

Stress and psychological factors before a migraine attack: A time-based analysis

Masahiro Hashizume; Ui Yamada; Asako Sato; Karin Hayashi; Yuichi Amano; Mariko Makino; Kazuhiro Yoshiuchi; Koji Tsuboi

BackgroundThe objective of this study is to examine the stress and mood changes of Japanese subjects over the 1–3 days before a migraine headache.MethodsThe study participants were 16 patients with migraines who consented to participate in this study. Each subject kept a headache diary four times a day for two weeks. They evaluated the number of stressful events, daily hassles, domestic and non-domestic stress, anxiety, depressive tendency and irritability by visual analog scales. The days were classified into migraine days, pre-migraine days, buffer days and control days based on the intensity of the headaches and accompanying symptoms, and a comparative study was conducted for each factor on the migraine days, pre-migraine days and control days.ResultsThe stressful event value of pre-migraine days showed no significant difference compared to other days. The daily hassle value of pre-migraine days was the highest and was significantly higher than that of buffer days. In non-domestic stress, values on migraine days were significantly higher than on other days, and there was no significant difference between pre-migraine days and buffer days or between pre-migraine days and control days. There was no significant difference in the values of domestic stress between the categories. In non-domestic stress, values on migraine days were significantly higher than other days, and there was no significant difference between pre-migraine days and buffer days or between pre-migraine days and control days.There was little difference in sleep quality on migraine and pre-migraine days, but other psychological factors were higher on migraine days than on pre-migraine days.ConclusionPsychosocial stress preceding the onset of migraines by several days was suggested to play an important role in the occurrence of migraines. However, stress 2–3 days before a migraine attack was not so high as it has been reported to be in the United States and Europe. There was no significant difference in the values of psychological factors between pre-migraine days and other days.


Biopsychosocial Medicine | 2014

Effects of gender, age, family support, and treatment on perceived stress and coping of patients with type 2 diabetes mellitus

Yoriko Hara; Mizuho Hisatomi; Hisao Ito; Motoyuki Nakao; Koji Tsuboi; Yoko Ishihara

BackgroundWe previously found that the empowerment of patients with type 2 diabetes mellitus can be strongly affected by gender and age in addition to self-managed diet and exercise behaviors and treatment. This study was to examine the effects of gender, age, family support, and treatment on the perceived stress and coping of patients with type 2 diabetes mellitus living with family.MethodsA survey was conducted of 140 adults with type 2 diabetes mellitus who were living with family. There was no significant difference in hemoglobin A1c (HbA1c) between male and female. Perceived stress and coping were measured with the Japanese version of the Appraisal of Diabetes Scale and the Lazarus Type Stress Coping Inventory. Stepwise regression analysis and path analysis were performed to identify factors that affect the perceived stress and coping of patients.Results(1) Perceived stress and coping were strongly affected by gender. (2) Perceived stress and coping were affected by age for males, but perceived stress was not affected by age for females. However, females showed a greater “psychological impact of diabetes” than did males. Females aged between 50 and 69 years engaged in active problem solving, but awareness of diabetes was low. (3) Treatment regimens had an effect on HbA1c for both sexes, and diet therapy affected the awareness of diabetes of males and coping of females. (4) For females, “sense of self-control” was strongly associated with coping, and those who were living with non-spouse family members had a greater psychological impact of diabetes than those living with only their spouse. (5) For males, coping was strongly affected by living with their spouse.ConclusionsThe results suggest that perceived stress, coping, and diet regimen are deeply associated with gender and age and that a male with type 2 diabetes mellitus living with his spouse is strongly dependent on support from the spouse. It is important to take into account gender, age, and family environment to provide patients with an individualized approach to addressing perceived stress and to provide education program for coping that can maximize treatment and maintain better, continuous glycemic control.


Health & Place | 2004

Health attitudes and behaviors: comparison of Japanese and Americans of Japanese and European Ancestry.

Carolyn Cook Gotay; Hiroyuki Shimizu; Miles Y. Muraoka; Yoko Ishihara; Koji Tsuboi; Hiroshi Ogawa

Adults living in Japan (N = 357) and the US (N = 223) completed semi-structured interviews assessing health-related attitudes and practices. The US respondents were of Japanese (N = 106) and European (N = 117) ancestry. Results indicated considerable similarity between the two US groups and significant differences between the Japanese and American respondents. The Japanese respondents placed less priority on health, had less belief in the efficacy of health screening tests, lower levels of internal health locus of control (HLOC), and higher levels of chance and powerful-others HLOC. While Japanese and Americans had similar overall levels of healthy behaviors, the Japanese were less likely to have obtained health screening tests (especially gynecologic exams). The findings have implications for adapting health promotion programs in the context of Japanese and American cultures.


Biopsychosocial Medicine | 2014

Development of a novel, short, self-completed questionnaire on empowerment for patients with type 2 diabetes mellitus and an analysis of factors affecting patient empowerment.

Yoriko Hara; Sanae Iwashita; Akira Okada; Yuji Tajiri; Hitomi Nakayama; Tomoko Kato; Motoyuki Nakao; Koji Tsuboi; Raoul Breugelmans; Yoko Ishihara

BackgroundPatient empowerment has recently been proposed as an important concept in self-management for effective glycemic control. A concise self-completed questionnaire for patients with type 2 diabetes mellitus was created to comprehensively evaluate their empowerment on the basis of self-managed dietary/exercise behaviors, psychological impact, and family support. The reliability and validity of this short questionnaire were tested and factors relating to patient empowerment were analyzed.MethodsThe self-completed empowerment questionnaire was based on questionnaires for self-managed dietary and exercise behaviors, the Appraisal of Diabetes Scale, and the Diabetes Family Behavior Checklist. The questionnaire was trialed on 338 male and female patients with type 2 diabetes mellitus who lived with family. The validity and reliability of the questionnaire were investigated and stepwise multiple linear regression analysis was used to identify factors that affect patient empowerment.ResultsThe self-completed patient empowerment questionnaire included 13 questions on background data (e.g., age, gender, and HbA1c) and 18 questions within five scales to assess self-managed dietary behaviors, self-managed exercise behaviors, and psychological impact of diabetes, as well as positive and negative feedback in patient-family communication. The questionnaire showed sufficient internal consistency, construct validity, reproducibility, factorial construct validity, and concurrent validity. The results were generally satisfactory, and the questionnaire reflected the particular characteristics of treatment methods. Multiple linear regression analysis showed that patient empowerment was strongly affected by the number of disease-related symptoms, age, and gender.ConclusionsThe results suggest that the concise self-completed empowerment questionnaire developed here is useful for measuring the empowerment of individual patients and evaluating the impact of symptoms and therapies on empowerment.


Biopsychosocial Medicine | 2013

Reviewer acknowledgement 2012

Koji Tsuboi

The editors of BioPsychoSocial Medicine would like to thank all our reviewers who have contributed to the journal in Volume 6 (2012).


Clinical Neurophysiology | 2010

P27-8 Electroencephalogram abnormalities in panic disorder: Study of symptom characteristics and pathology

Karin Hayashi; Masahiro Hashizume; Koichi Nakano; Koji Tsuboi

M. Cincotta1, A. Borgheresi1, I. Pampaloni2, F. Giovannelli1,3, S. Bernardi4, A. Cantisani5, G. Zaccara1, S. Pallanti4,5 1Unit of Neurology, Florence Health Authority, Florence, Italy, 2Department of Psychiatry, Surrey and Borders Partnership Foundation Trust, UK, 3Department of Psychology, University of Florence, Florence, Italy, 4Department of Psychiatry, Mount Sinai School of Medicine, New York, USA, 5Department of Psychiatry, University of Florence, Florence, Italy


Clinical Neurophysiology | 2006

P36.44 Research into the panic disorder with EEG abnormalities, about characteristic symptoms and findings

Karin Hayashi; S. Asahina; A. Kugahara; H. Watabe; Masahiro Hashizume; Koichi Nakano; Koji Tsuboi

cortex, the excitation was transmitted to the parietal and the temporal association areas, and then from these two association areas to the frontal association area. This pathway was shown repetitively until a button was pushed. When the reaction time was delayed, the frequencies of excitation in the left frontal association area, the right parietal association area and both visual cortices increased. These results indicated that the chronological changes of beta wave were due to excitation from the cortico-cortical connection of the cerebral cortex. The left prefrontal is an important area for cognitive function. Therefore the left frontal association area probably plays an important role in decision-making for a fast reaction.


Psycho-oncology | 2004

Cancer-related attitudes: A comparative study in Japan and the US.

Carolyn Cook Gotay; Hiroyuki Shimizu; Miles Y. Muraoka; Yoko Ishihara; Koji Tsuboi; Hiroshi Ogawa


Diabetes Research and Clinical Practice | 2011

The reliability and validity of the Japanese version of the Appraisal of Diabetes Scale for type 2 diabetes patients

Yoriko Hara; Satoshi Koyama; Toru Morinaga; Hisao Ito; Shusuke Kohno; Hiroyuki Hirai; Toshio Kikuchi; Toru Tsuda; Isao Ichino; Satoko Takei; Kentaro Yamada; Koji Tsuboi; Raoul Breugelmans; Yoko Ishihara

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