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Featured researches published by Hirohisa Imai.


Environmental Health and Preventive Medicine | 2010

Association between lifestyle habits and bone mineral density in Japanese juveniles

Yoshihiko Nakagi; Toshihiro Ito; Kenzo Hirooka; Yoshihiko Sugioka; Hitoshi Endo; Yasuaki Saijo; Hirohisa Imai; Hidekatsu Takeda; Fujio Kayama; Satoshi Sasaki; Takahiko Yoshida

ObjectivesWe explored the relationship between bone mineral density (BMD) and lifestyle in juveniles to identify factors leading to higher peak bone mass and prevention of osteoporosis in later life.MethodsJuveniles (1,364 students: 770 boys and 594 girls, aged 6–18xa0years) attending school in Hokkaido prefecture, Japan, were asked to complete a brief self-administered diet history questionnaire for 10-year-olds (BDHQ10y) providing information about personal history, lifestyle, and intake of nutritional elements. In addition, BMD and grip strength were measured. We analyzed the relationship between BMD and lifestyle factors.ResultsThe difference in BMD for boys was larger among the junior and senior high school groups. The difference in BMD for girls was larger among older elementary and later school children. Anthropometric variables and grip strength were strongly correlated with BMD. Having a nap-time routine was significantly correlated with BMD, but sleep time and sports club activities were not. BMD among juveniles who attained secondary sexual characteristics was significantly higher than that of juveniles of the same age who had not attained these characteristics. Calcium intake was significantly lower in senior high school students compared with other grades. Consumption of milk by senior high school boys and junior high school girls was weakly correlated with BMD.ConclusionsOur findings encourage educational interventions to counsel students to avoid weight loss and calcium deficiency. This effective intervention should begin before the higher elementary school, when juveniles have the greatest likelihood for preventing lower peak bone mass and osteoporosis.


Cancer Research | 2015

Abstract P5-15-09: National survey of chemotherapy-induced appearance issues in breast cancer patients

Takanori Watanabe; Hiroshi Yagata; Mitsue Saito; Hiroko Okada; Tomoko Takayama; Hirohisa Imai; Yuko Yoshida; Nao Tamai; Keiko Nozawa; Tamiko Yajima; Kojiro Shimozuma

Background: Many breast cancer patients suffer hair loss due to chemotherapy, and not only scalp hair loss, but also eyebrow loss, eyelash loss and nail changes induced by chemotherapy are traumatic for patients. These side effects diminish self-esteem and greatly reduce quality of life. However, there has been little research in this field until now. To clarify the actual situation concerning appearance issues in breast cancer patients who received adjuvant chemotherapy, and to consider a support system for these patients, we conducted a questionnaire survey. Methods: Disease-free breast cancer patients who have received adjuvant chemotherapy containing anthracycline and/or taxane within 5 years were recruited from 47 hospitals or clinics in Japan from April to October 2013. The patients participating in this survey completed a 65-question questionnaire concerning appearance issues (48) and their perception of physical and non-physical side effects (17). The drugs administered and treatment period were filled out by their doctors beforehand. The completed questionnaires were mailed directly to the data center by the patients. Results: A total of 1511 patients returned the questionnaire to the data center with a response rate of 82% (1511/1853). Since 33 patients did not meet the entry criteria, the questionnaires returned by 1478 patients were analyzed in this survey. The mean age was 54.7 years (+-10.4, range 17-79). The distribution of the patients by time from the end of chemotherapy to this survey was as follows: Conclusions: Our survey demonstrated the outline of hair loss and appearance issues in breast cancer patients who received chemotherapy. Hair loss is the most distressing and occasionally long-lasting side effect. Lack of information is a serious problem. These facts suggested a need for long-time and careful support of these patients. Citation Format: Takanori Watanabe, Hiroshi Yagata, Mitsue Saito, Hiroko Okada, Tomoko Takayama, Hirohisa Imai, Yuko Yoshida, Nao Tamai, Keiko Nozawa, Tamiko Yajima, Kojiro Shimozuma. National survey of chemotherapy-induced appearance issues in breast cancer patients [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P5-15-09.


Cancer Research | 2015

Abstract P5-15-17: National survey of long-term recovery from chemotherapy-induced hair loss in patients with breast cancer

Hiroshi Yagata; Takanori Watanabe; Hiroko Okada; Mitsue Saito; Tomoko Takayama; Hirohisa Imai; Yuko Yoshida; Nao Tamai; Keiko Nozawa; Tamiko Yajima; Kojiro Shimozuma

Background: Altered appearance due to chemotherapy is a very distressing adverse event and can remain unrecovered for a long time after chemotherapy. To clarify the current status of appearance change and its support systems, we conducted a national questionnaire survey of patients with breast cancer who had received chemotherapy in Japan. Here, we report on the long-term recovery of scalp hair loss during and after chemotherapy. Patients and methods: A questionnaire was distributed to patients in hospitals throughout Japan between April and October 2013. The questionnaire was regarding the current status of the patients’ appearance issues (scalp hair, eyebrows, eyelashes, nails, skin) related to chemotherapy and its support systems, including chemotherapy regimens received, endocrine therapy received, and duration after chemotherapy. Eligible patients were women with breast cancer without any recurrence who had received adjuvant or neoadjuvant chemotherapy containing anthracycline (A) and/or taxanes (paclitaxel, P; docetaxel, D) and who were within 5 years from the last chemotherapy treatment. The physicians of each hospital asked their patients to fill out the questionnaire and mail it directly to the data center. The scalp hair status was analyzed in a cross-sectional manner according to the duration from chemotherapy. Results: The questionnaires were returned from 1511 patients in 47 hospitals (response rate, 82%; 1511/1853). Thirty-three patients were excluded, mainly because >5 years had passed since chemotherapy. In total, 1478 questionnaires were ultimately analyzed. The median age was 50 (range, 17–79) years. The distribution of patients according to time from the last chemotherapy treatment was as follows: 80% hair loss. Hair growth began during chemotherapy in 13.1% of patients and after chemotherapy in 80.3% (6.6% left the question unanswered). Within 6 months from the start of hair growth, 65% of patients felt a change in hair thickness, while 82% felt it was becoming thin. Of the patients, 70% felt a change in quality, while 48% felt that it had become unruly; 44% felt a color change, while 80% felt that they were growing more gray hair. Of the patients who answered the questions, >80% hair volume recovery was seen in 52.7% of patients within 1 year; in 63.5%, in 1–3 years; and in 61.7%, even after 3 years. After 3 years, volume recovery was seen in 67.8% of patients after an A+P–containing regimen; in 43.4%, after A+D; in 63.5%, after D; and in 88.9%, after A. Patients who had received A+P, D, and A+D had significantly less volume recovery than patients who had received A (P Conclusions: Almost all patients with breast cancer experienced severe hair loss during standard chemotherapy, but a recovery trend was noted after chemotherapy. However, hair remained unrecovered to various degrees in a significant number of patients even 3–5 years after chemotherapy, especially in those who had received taxane-containing regimens. We should consider the support needs of patients who experience chemotherapy-induced hair loss. Citation Format: Hiroshi Yagata, Takanori Watanabe, Hiroko Okada, Mitsue Saito, Tomoko Takayama, Hirohisa Imai, Yuko Yoshida, Nao Tamai, Keiko Nozawa, Tamiko Yajima, Kojiro Shimozuma. National survey of long-term recovery from chemotherapy-induced hair loss in patients with breast cancer [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P5-15-17.


Japanese Journal of Clinical Oncology | 2006

Evidence-Based Risk Factors for Seroma Formation in Breast Surgery

Katsumasa Kuroi; Kojiro Shimozuma; Tetsuya Taguchi; Hirohisa Imai; Hiroyasu Yamashiro; Shozo Ohsumi; Shinya Saito


Breast Cancer | 2005

Pathophysiology of Seroma in Breast Cancer

Katsumasa Kuroi; Kojiro Shimozuma; Tetsuya Taguchi; Hirohisa Imai; Hiroyasu Yamashiro; Shozo Ohsumi; Shinya Saito


Breast Cancer | 2007

Quality of life of Breast Cancer patients and types of surgery for Breast Cancer — current status and unresolved issues —

Shozo Ohsumi; Kojiro Shimozuma; Katsumasa Kuroi; Michikazu Ono; Hirohisa Imai


Breast Cancer | 2006

Effect of mechanical closure of dead space on seroma formation after breast surgery.

Katsumasa Kuroi; Kojiro Shimozuma; Tetsuya Taguchi; Hirohisa Imai; Hiroyasu Yamashiro; Shozo Ohsumi; Shinya Saito


Health Policy | 2005

Characteristics of psychiatric hospitals associated with length of stay in Japan

Hirohisa Imai; Jun Hosomi; Hiroyuki Nakao; Hiromasa Tsukino; Takahiko Katoh; Toshihiro Itoh; Takahiko Yoshida


Breast Cancer | 2007

Recent topics of health outcomes research in oncology

Kojiro Shimozuma; Hirohisa Imai; Katsumasa Kuroi; Shozo Ohsumi; Michikazu Ono


Breast Cancer | 2007

Economic evaluation of the prevention and treatment of breast cancer-present status and open issues

Hirohisa Imai; Katsumasa Kuroi; Shozo Ohsumi; Michikazu Ono; Kojiro Shimozuma

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Hiroshi Yagata

Saitama Medical University

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Shinya Saito

Kochi Women's University

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