Affiliation 【 display / non-display 】

Affiliation 【 display / non-display 】

• Sapporo Medical University   Health Care Administration and Management   Assistant Professor  

Papers 【 display / non-display 】

Papers 【 display / non-display 】

• Challenges and implications of dual employment among physicians in Japan

  Sachiyo Nishida, Emiko Usui, Emi Akizuki, Ryuta Kamekura, Marie Ogawa, Kazufumi Tsuchihashi, Naoya Masumori

  Discover Health Systems ( Springer Science and Business Media LLC )  4 ( 1 )  2025.04

  DOI

• Motherhood penalty for female physicians in Japan: evidence from a medical school's alumni data.

  Sachiyo Nishida, Emiko Usui, Takashi Oshio, Naoya Masumori, Kazufumi Tsuchihashi

  BMC health services research   24 ( 1 ) 1183 - 1183  2024.10  [International journal]

  　View Summary

  BACKGROUND: Female physicians with children often work fewer hours and take fewer shifts due to additional family responsibilities. This can contribute to a gender pay gap in the medical profession. However, limited research in Japan has quantitatively examined the factors contributing to this gap. This study aims to address this gap in the literature. METHODS: We analyzed the alumni data from a medical school in Hokkaido, Japan, for 260 physicians (198 males and 62 females). We used multivariable regression models to identify factors influencing earnings from medical practice, with a focus on gender, work schedules, parenthood, and any career interruptions related to childcare. RESULTS: Our analysis revealed a 25.0% earnings gap between male and female physicians. Nearly all female physicians with children experienced career interruptions due to childcare, while this was uncommon for male physicians. When these childcare-related interruptions were factored in, the gender pay gap narrowed by 9.7%. After adjusting for work schedules and specialty choices, female physicians with children still earned 37.2% less than male physicians, while those without children earned only 4.4% less. This suggests that motherhood is a significant driver of the gender pay gap among physicians. CONCLUSIONS: These findings highlight the negative impact of motherhood on female physicians' earnings. This emphasizes the need for policy measures to mitigate the disadvantages faced by mothers in the medical profession.

  DOI PubMed

• Japanese female urologists' work‐life balance during the COVID‐19 pandemic

  Sachiyo Nishida, Hitomi Sasaki, Yoshiko Maeda, Masayuki Koyama, Katsuhito Miyazawa, Naoya Masumori

  International Journal of Urology    2022.12

  DOI

• Dilemma of physician-mothers faced with an increased home burden and clinical duties in the hospital during the COVID-19 pandemic.

  Sachiyo Nishida, Kanna Nagaishi, Masayo Motoya, Ayako Kumagai, Noriko Terada, Ai Kasuga, Narumi Kubota, Kotoe Iesato, Motonobu Kimizuka, Satsuki Miyajima, Masayuki Koyama, Hirofumi Ohnishi, Eichi Narimatsu, Naoya Masumori, Kazufumi Tsuchihashi, Taiji Tsukamoto, Yoshihisa Tsuji

  PloS one   16 ( 6 ) e0253646  2021  [International journal]

  Authorship：   Lead author

  　View Summary

  PURPOSE: Since December 2019, coronavirus disease 2019 (COVID-19) has spread rapidly across the world. During the pandemic, physicians in our hospital have had to respond both to the issue of treating the patients and the increasing domestic burden associated with social disruption. The purpose of this study was to assess how much the burden on our doctors, especially female doctors, was increasing. MATERIAL AND METHODS: The Physicians' Career Support Committee in Sapporo Medical University conducted a questionnaire survey. The questionnaire inquired about a wide range of subjects with regard to working style and family life during the first and second waves of the COVID-19 pandemic, and was sent to all medical/dental physicians working in Sapporo Medical University. RESULTS: A total of 266 (42.7%) physicians in our hospital responded to our questionnaire and the data for 264 data were analyzed. The total numbers of males, females, and others, including those who did not want to specify, were 178 (67.4%), 82 (31.0%), and 4 (1.5%), respectively. Among them, 62 (23.5%) and 23 (8.7%) answered that their domestic burden was slightly or markedly increased. The increase in the domestic burden showed a significant difference between genders (p = 0.04). Even after correction for background differences using multivariate analysis, being female (p<0.001), having child dependents (p<0.001), and treating COVID-19 patients (p = 0.03) were significantly related to an increased domestic burden. Regarding family style, 58.1% of the physician-fathers were from two-income families (i.e., families with both parents in employment), and they answered that their partner mainly cared for the children. In contrast, 97.3% of physician-mothers were from two-income families, and 94.6% of the physician-mothers had to take care of children by themselves. CONCLUSION: Physician-mothers are caught in a dilemma between an increased home burden and clinical duties in the hospital, with a significantly higher ratio than physician-fathers during the pandemic. As we showed, female doctors could have not continued their careers and take responsible positions in the same way as male doctors. This is a social risk in the timing of a crisis, such as a pandemic.

  DOI PubMed

• Expression of hepatocyte growth factor in prostate cancer may indicate a biochemical recurrence after radical prostatectomy.

  Sachiyo Nishida, Yoshihiko Hirohashi, Toshihiko Torigoe, Masanori Nojima, Ryuta Inoue, Hiroshi Kitamura, Toshiaki Tanaka, Hiroko Asanuma, Noriyuki Sato, Naoya Masumori

  Anticancer research   35 ( 1 ) 413 - 8  2015.01  [International journal]

  Authorship：   Lead author

  　View Summary

  We previously found that prostate cancer stem-like cells (CSCs)/cancer-initiating cells (CICs) express hepatocyte growth factor (HGF) and that the HGF/c-MET proto-oncogene product (c-MET) signal has a role in the maintenance of prostate CSCs/CICs in an autocrine fashion. HGF is, thus, a novel marker for prostate CSCs/CICs. We hypothesized that high expression of HGF might be related to early recurrence of prostate cancer after radical prostatectomy, and the purpose of the present study was to evaluate the relationship between expression of HGF in prostate tissues and biochemical recurrence after radical prostatectomy. One hundred-one patients with prostate cancer who underwent open or laparoscopic radical prostatectomy from November 2008 to October 2011 with an adequate prostate-specific antigen (PSA) follow-up period, were investigated. Immunohistochemical staining of HGF was compared to biochemical recurrence after radical prostatectomy. Patients with tumors exhibiting HGF positivity of 5% or more had a significantly shorter biochemical recurrence-free period than that of patients whose tumor HGF positivity was less than 5% (p=0.001). In multivariate Cox regression, preoperative PSA and HGF positivity were independent predictors of biochemical recurrence following prostatectomy. Our finding suggests a direct link between expression of HGF, a novel prostate marker of CSCs/CICs, and biochemical recurrence after radical prostatectomy in patients with prostate cancer.

  PubMed

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Misc 【 display / non-display 】

Misc 【 display / non-display 】

• 自家腎移植術、再発・転移巣局所治療により、長期に病勢制御および腎機能保持が得られている、同時性両側腎癌の1例

  田中 俊明, 前鼻 健志, 進藤 哲哉, 京田 有樹, 西田 幸代, 橋本 浩平, 小林 皇, 舛森 直哉

  腎癌研究会会報 ( (一社)腎癌研究会 )  ( 54 ) 55 - 55  2024.07

• ロボット時代の手術教育 開腹,腹腔鏡,ロボット手術 スキマ時間でスキルアップ ロボット時代のOff the job training

  西田 幸代

  泌尿器外科 ( 医学図書出版(株) )  37 ( 臨増 ) 602 - 603  2024.06

• 当院におけるRARP200例の治療成績

  柴森 康介, 佐藤 俊介, 吉川 友博, 桧山 佳樹, 松木 雅裕, 西田 幸代, 伊藤 直樹

  泌尿器外科 ( 医学図書出版(株) )  36 ( 5 ) 426 - 426  2023.05

• 当院におけるRARP200例の治療成績

  柴森 康介, 佐藤 俊介, 吉川 友博, 桧山 佳樹, 松木 雅裕, 西田 幸代, 伊藤 直樹

  泌尿器外科 ( 医学図書出版(株) )  36 ( 5 ) 426 - 426  2023.05

• JUAの女性座長リスト企画の経緯と真意

  佐々木 ひと美, 西田 幸代, 小林 知子, 山本 泰代, 前田 佳子, 松下 千枝, 高橋 さゆり, 増田 朋子, 松本 富美, 川崎 麻巳, 久米 春喜, 舛森 直哉, 宮澤 克人, 日本泌尿器科学会ダイバーシティ推進委員会・女性座長候補者リスト作成ワーキンググループ

  日本泌尿器科学会総会 ( (一社)日本泌尿器科学会総会事務局 )  110回   np3 - np3  2023.04

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Awards 【 display / non-display 】

Awards 【 display / non-display 】

• 令和3年度学術賞

  2022.07   札幌医科大学医師会  

• 第15回稲田賞症例報告部門

  2022.06   泌尿器科紀要編集部   難治性低カルシウム・低リン血症をきっかけにFGF23高値を指摘された前立腺癌多発骨転移の1例

• 優秀論文賞

  2015.03   札幌医科大学  

• 学術賞

  2015.03   札幌医科大学医師会  

• 奨励賞

  2013.03   北海道癌談話会  

Research Projects 【 display / non-display 】

Research Projects 【 display / non-display 】

• 男性比率の高い領域での女性活躍推進：医学生の診療科選択の現状と課題

  基盤研究(B)

  Project Year :

  2023.04

  -

  2028.03

   

  臼井 恵美子, 西田 幸代, 松倉 力也, 中村 さやか, 奥村 綱雄, Masson・Makdissi Etienne

• 男性比率の高い領域での女性活躍推進：医学生の診療科選択の現状と課題

  基盤研究(B)

  Project Year :

  2023.04

  -

  2028.03

   

  臼井 恵美子, 西田 幸代, 松倉 力也, 中村 さやか, 奥村 綱雄

• Isolation of prostate cancer stem-like cell and establishment of specific prostate cancer immunotherapy

  Grant-in-Aid for Scientific Research (C)

  Project Year :

  2012.04

  -

  2015.03

   

  MASUMORI Naoya, KITAMURA Hiroshi, NISHIDA Sachiyo

  　View Summary

  The purpose of this study was to investigate prostate Cancer Stem Cells/ Cancer Initiating Cell (CSCs/CICs). Prostate CSCs ／ CICs were isolated as ALDH1 high cells using the ALDH1 activity assay. We found that prostate CSCs ／ CICs expressed higher levels of growth factors including hepatocyte growth factor (HGF). The results indicate that HGF secreted by prostate CSCs ／ CICs. The purpose of the next study was to evaluate the relationship between expression of HGF in prostate tissues and biochemical recurrence after radical prostatectomy. Immunohistochemical staining of HGF was compared to biochemical recurrence after radical prostatectomy. Patients with tumors exhibiting HGF positivity of 5% or more had a significantly shorter biochemical recurrence-free period than that of patients whose tumor HGF positivity was less than 5%. Our data suggests that therapeutic targeting of CSCs/CICs in prostate cancer is a future possibility

Committee Memberships 【 display / non-display 】

Committee Memberships 【 display / non-display 】

• 2024.11

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  Now

    日本泌尿器内視鏡・ロボティクス学会医工連携・新技術検討委員会

• 2024.02

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  Now

    がん診療ガイドライン評価委員会

• 2023.04

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  Now

    広報委員会

• 2023.04

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  Now

    会則検討委員会

• 2022.11

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  Now

    日本泌尿器内視鏡・ロボティクス学会 教育委員会委員

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