Osaka, Wakako

写真a

Affiliation

Faculty of Nursing and Medical Care (Shonan Fujisawa)

Position

Associate Professor

External Links
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Career 【 Display / hide 】

  • 2005.04
    -
    2007.03

    聖路加看護大学, 成人看護学, 助手

  • 2007.04
    -
    2012.03

    聖路加看護大学, 成人看護学, 助教

  • 2015.10
    -
    2020.03

    St. Luke’s International University, 客員研究員

  • 2016.04
    -
    2018.12

    Jikei University, Faculty of Medicine School of Nursing, 講師

  • 2019.01
    -
    Present

    Keio University, Faculty of Nursing and Medical Care, 准教授

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Research Areas 【 Display / hide 】

  • Life Science / Clinical nursing

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Research Keywords 【 Display / hide 】

  • Cancer Nursing

  • がん看護学

  • サポートグループ

  • ディシジョンエイド

  • ピアサポート

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Books 【 Display / hide 】

  • 実践 シェアード・ディシジョンメイキング 改題改訂第２版

    中山　健夫　他, 日本医事新報社, 2024.06

    Scope: 4 意思決定支援ツール（ディシジョンエイド）の 作成・活用 ②乳がん患者の手術方法に関するディシジョンエイドの作成と活用,  Contact page： 66-83

  • ドレーン&チューブ管理マニュアル : 特定行為に役立つ : 臨床に活かせる

    永井 秀雄, 佐田 尚宏, 中村 美鈴, 学研メディカル秀潤社, 学研プラス (発売), 2019

  • これから始める!シェアード・ディシジョンメイキング : 新しい医療のコミュニケーション

    中山 健夫, 日本医事新報社, 2017

  • 乳がん診療聖路加スタイル : 最高のチーム医療をめざして

    北野 敦子, 山内 英子, 中外医学社, 2012

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Papers 【 Display / hide 】

  • Influence of participation in a medical-themed Science Café on patient activation

    Yuta Okazawa, Hayato Kizaki, Nobuyuki Suzuki, Wakako Osaka, Satoko Hori

    Patient Preference Adherence (Patient Preference and Adherence)  17   3093 - 3106 2023.11

    Accepted,  ISSN  1177-889X

    　View Summary

    Purpose: This study aims to investigate the impact of a Science Café (SC) dealing with medical topics on participants’ patient activation (PA), a concept that refers to patients’ involvement in managing their own health, working with their healthcare providers, and maintaining their health. Material and Methods: Semi-structured interviews were conducted with patients who had participated in a medical SC (n = 10) to identify the medical SC-associated factors that influenced PA. Through a questionnaire of medical SC participants (n = 23), the impact on PA and correlations with relevant psychological measures were quantitatively assessed. Results: The interviews revealed three factors: “Experience & acceptance of chronic conditions”, “Features of medical SC” and “Changes as a result of participation.” The questionnaire results showed a positive correlation between PA and resilience and a negative correlation with decision regret. Conclusions: Participation in a medical SC by people with illnesses can improve PA by improving knowledge and skills for self-management and increasing self-awareness of illness in a supportive environment. The study highlights the potential benefits of using medical SC as a strategy for healthcare providers to improve PA and health outcomes.

  • 産科医療に従事する多職種チームメンバーを対象としたシェアード・ディシジョンメイキング教育プログラムの開発プロセスと受容性の検討

    Wakako Osaka, Yumi Aoki, Rie Notomi, Akiko Endo, Miho Nakano, Naoko Arimori

    Health Communication Research (日本ヘルスコミュニケーション学会)  14 ( 2 ) 27 - 38 2023.10

    Lead author, Accepted

    　View Summary

    目的:本研究の目的は、産科医療に携わる多職種チームメンバーを対象としたシェアード・デシジョンメーキング(Shared Decision Making:以下SDM)教育プログラムの開発プロセスを記述すること、およびその一貫として本プログラムの適用を試み、受容性を検討し改善点を明らかにすることである。方法:本プログラムは、日本の産科医療におけるSDMの現状把握と既存の2つのSDM教育プログラムを比較検討した上で設計し、講義動画視聴と課題に取り組む個人学習(オンラインオンデマンド型)と、職場で共に働く多職種チームメンバーが合同で受講する集合学習(ロールプレイとディスカッション、オンラインライブ配信型)で構成した。2施設の産科医療に従事する多職種チームメンバーを対象に適用し、集合学習終了後に受容性や満足度を尋ねるアンケートを実施した。結果:13名がアンケートに回答し、本プログラムは概ねわかりやすく満足度が高いことが示されたが、3名は、所要時間が適切ではないと回答した。結論:本プログラムは、日本において様々な施設の産科医療に携わる多職種チームに普及できる可能性があるが、学習時間の短縮化を図り、さらに参加しやすい方法へ改善する必要がある。(著者抄録)

  • Development and acceptability of a decision aid for women with a BRCA pathogenic variant considering cancer risk management strategies

    Okawa Megumi, Osaka Wakako

    Journal of Hereditary Tumors (The Japanese Society for Hereditary Tumors)  22 ( 1 ) 9 - 16 2022.08

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    　Women with a BRCA pathogenic variant are required to manage the risk of breast and ovarian cancer. Decision-making of the optimal strategy (e.g., prophylactic surgery, chemoprevention, or surveillance) is very complex and difficult due to uncertain effects and impact. This study aimed to develop a decision aid for women with a <i>BRCA</i> pathogenic variant and evaluate its acceptability. The International Patient Decision Aids Standards were used as a guide for an evidence-based development process. We created a prototype using the Ottawa Decision Support framework. During its development, we conducted required assessment from six experts. Once completed, its acceptability was assessed via semi-structured interviews, which included open-ended feedback, with 27 women with a <i>BRCA</i> pathogenic variant. All the participants felt the decision aid would have been helpful during their consultation and recommended it for future patients. However, many participants indicated the need for further information regarding the various symptoms after risk-reducing salpingo-oophorectomy and the cost of each medical strategy. Acceptability of the decision aid was high. Furthermore, based on the evaluation, it was further revised to meet the needs.

  • Shared decision making, physicians’ explanations, and treatment satisfaction: a cross-sectional survey of prostate cancer patients

    Kazuhiro Nakayama, Wakako Osaka, Nobuaki Matsubara, Tsutomu Takeuchi, Mayumi Toyoda, Noriyuki Ohtake, Hiroji Uemura

    BMC Medical Informatics and Decision Making (Springer Science and Business Media LLC)  20 ( 1 ) 334 - 334 2020.12

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    <title>Abstract</title><sec>
    <title>Background</title>
    Hormone therapy is one option for some types of prostate cancer. Shared decision making (SDM) is important in the decision making process, but SDM between prostate cancer patients receiving hormone therapy and physicians is not fully understood. This study tested hypotheses: “Patients’ perception of SDM is associated with treatment satisfaction, mediated by satisfaction with physicians’ explanations and perceived effective decision making” and “The amount of information provided to patients by physicians on diseases and treatment is associated with treatment satisfaction mediated by patients’ perceived SDM and satisfaction with physicians’ explanations.”


    </sec><sec>
    <title>Methods</title>
    This cross-sectional study was conducted using an online panel via a private research company in Japan. The participants in this study were patients registered with the panel who had received or were currently receiving hormone therapy for prostate cancer and physicians registered with the panel who were treating patients with prostate cancer. Measures used in this study included a nine-item Shared Decision Making Questionnaire, levels of satisfaction with physicians’ explanations and treatment satisfaction, and effective decision making for patients (feeling the choice is informed, value-based, likely to be implemented and expressing satisfaction with the choice), and a Shared Decision Making Questionnaire for Doctors. The hypotheses were examined using path analysis.


    </sec><sec>
    <title>Results</title>
    In total, 124 patients and 150 physicians were included in the analyses. In keeping with our hypotheses, perceived SDM significantly correlated with the physicians’ explanations and perceived effective decision making for patients, and satisfaction with physicians’ explanations and perceived effective decision making for patients were both related to treatment satisfaction. Although the amount of information provided to patients was correlated with the perceived SDM, it was indirectly related to their satisfaction with physicians’ explanations.


    </sec><sec>
    <title>Conclusions</title>
    When physicians encourage patients to be actively involved in making decisions about treatment through the SDM process while presenting a wide range of information at the start of hormone therapy, patients’ effective decision making and physicians’ explanations may be improved; consequently, the patients’ overall treatment satisfaction may be improved. Physicians who treat patients with prostate cancer may have underestimated the importance of SDM before starting hormone therapy, even greater extent than patients.


    </sec>

  • Effect of a decision aid on the choice of pregnant women whether to have epidural anesthesia or not during labor

    Eri Shishido, Wakako Osaka, Ayame Henna, Yuko Motomura, Shigeko Horiuchi

    PLOS ONE (Public Library of Science (PLoS))  15 ( 11 ) e0242351 - e0242351 2020.11

    Research paper (scientific journal), Joint Work, Accepted

    　View Summary

    <sec id="sec001">
    <title>Objective</title>
    Decision aids (DAs) are useful in providing information for decision-making on using epidural anesthesia during birth. To date, there has been little development of DAs for Japanese pregnant women. Herein, we investigated the effect of a DA on the decision of pregnant women whether to have epidural anesthesia or not for labor during vaginal delivery. The primary outcome was changes in mean decision conflict score.


    </sec>
    <sec id="sec002">
    <title>Methods</title>
    In this non-randomized controlled trial, 300 low-risk pregnant women in an urban hospital were recruited by purposive sampling and assigned to 2 groups: DA (intervention) and pamphlet (control) groups. Control enrollment was started first (until 150 women), followed by intervention enrollment (150 women). Pre-test and post-test scores were evaluated using the Decision Conflict Scale (DCS) for primary outcome, knowledge of epidural anesthesia and satisfaction with decision making for secondary outcomes, and decision of anesthesia usage (i.e., with epidural anesthesia, without epidural anesthesia, or undecided).


    </sec>
    <sec id="sec003">
    <title>Results</title>
    Women in the DA group (n = 149: 1 excluded because she did not return post-test questionnaire) had significantly lower DCS score than those in the pamphlet group (n = 150) (DA: -8.41 [SD 8.79] vs. pamphlet: -1.69 [SD 5.91], p &lt; .001). Knowledge of epidural anesthesia and satisfaction with decision-making scores of women who used the DA were significantly higher than those of women who used the pamphlet (p &lt; .001). Women in the DA group showed a significantly lower undecided rate than those in the pamphlet group. The number of undecided women in the DA group significantly decreased from 30.2% to 6.1% (p &lt; .001), whereas that in the pamphlet group remained largely unchanged from 40.7% to 38.9%.


    </sec>
    <sec id="sec004">
    <title>Conclusion</title>
    This study indicates that a DA can be useful in helping women make a decision whether to have epidural anesthesia or not for labor during vaginal delivery.


    </sec>

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • The Role and Challenges of Patient Engagement for Shared Decision-Making

    Wakako Osaka, Hirono Ishikawa, Seiji Bito, Sayoko Kawano, Takeo Nakayama

    日本ヘルスコミュニケーション学会誌 16 ( 11 ) 21 - 30 2025.04

    Lead author

  • 特集【患者の思いを引き出して支え、力を高める意思決定支援】ヘルスリテラシーを高めて意思決定を支援する

    大坂和可子

    がん看護 30 ( 2 ) 130 - 134 2025.03

  • 患者のヘルスリテラシーに考慮したシェアードディシジョンメイキング　ディシジョンエイド活用の有用性

    大坂 和可子

    日本乳癌学会総会プログラム抄録集 ((一社)日本乳癌学会)  31回   50 - 50 2023.06

  • がん患者の持つ力に沿った意思決定支援のアウトカム　ディシジョンエイドを活用した意思決定支援におけるアウトカム

    大坂 和可子

    日本がん看護学会学術集会 ((一社)日本がん看護学会)  37回   36 - 36 2023.02

  • 【乳房再建マニュアル-根治性、整容性、安全性に必要な治療戦略-】基礎編　個々の患者に最適な乳房再建を選択するためのshared decision making

    素輪 善弘, 大坂 和可子

    PEPARS ((株)全日本病院出版会)   ( 183 ) 47 - 55 2022.03

    ISSN  1349-645X

    　View Summary

    近年、日本の乳房再建は変容と多様化が進み、脂肪移植術を含めた自家組織とインプラントを様々な組み合わせで適応していくオーダーメイド化した個別医療が加速している。一方で治療方針が複雑化していく懸念もあり、個人に合った再建法の最適化が次なる課題となっている。また最近では、患者が治療方針決定に積極的に参加できるよう支援し、決定プロセスを共有しながら、患者と医療者が協働的に治療法を決めていくshared decision making(SDM)という新しい意思決定スタイルが注目されている。SDMは、乳癌治療や乳房再建医療においても重要性を増しており、選択肢に関する中立的で正確な情報、様々な価値観を示し、患者自身が能動的に決定を進めること促すdecision aids(DA)を活用することで円滑かつ有効にSDMを促進することができる。SDMを適切に実践していくためには、本邦においても、質の高いDAの開発が急がれる。(著者抄録)

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Presentations 【 Display / hide 】

  • シンポジウム16: 子ども達のWell-beingを目指して －Biomedicineとは異なる研究アプローチの扉を開くー 「子どもの医療におけるShared Decision Makingを促進するディシジョンエイドの活用」

    大坂和可子

    第67回日本小児神経学会学術集会, 

    2025.06
    , 

    Symposium, workshop panel (nominated)

  • JCS 2025 HEPT（心不全緩和ケアトレーニングコース）セッション「意思決定支援をどう行っていくべきか？循環器領域におけるShared-decision makingを深考する」特別講演

    大坂和可子

    第89回日本循環器学会学術集会, 

    2025.03
    , 

    Oral presentation (invited, special)

  • 交流集会 意思決定プロセス共有のための方略－価値観を明確にする『オタワ意思決定ガイド』を使 ってみよう！

    青木 裕見, 大坂 和可子, 青木 頼子, 藤田 美保, 山本 加奈子, 江藤 亜矢子, 端山, 淳子, 有森 直子, 中山 和弘

    第44回日本看護科学学会学術集会, 

    2024.12

  • Design and acceptability of an online training program on the development and implementation of decision aids for Japanese healthcare providers

    Wakako OSAKA, Yumi AOKI, Yuki YONEKURA, Hitomi DANYA, Kazuhiro NAKAYAMA

    12th International Shared Decision Making Conference (Lausanne) , 

    2024.07
    , 

    Poster presentation

  • 教育講演18 ガイドラインで推奨された Decision Aids、 質問促進リストの使い方「ガイドラインで推奨された Decision Aidsの使い方」

    大坂和可子

    第29回日本緩和医療学会学術大会 第37回日本サイコオンコロジー学会総会 合同学術大会, 

    2024.06

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • がん患者の主体的な意思決定参加を促すSDMの組織定着を目指す実装モデルの構築

    2022.04
    -
    2026.03

    日本学術振興会, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Principal investigator

    　View Summary

    本研究は、がん患者の主体的な意思決定参加を促すSDMが組織内に定着し、患者の意思決定の質を組織レベルで向上することを目指し、①がん医療におけるSDMの障壁となる要因と促進要因を明らかにすること、② ①の結果を踏まえ、障壁となる要因を取り除き、促進要因を強化するための実装モデルを構築すること、③ ②で構築した実装モデルに対するがん医療に携わる医療者による受容性と有用性の認識の程度、および実装モデルの改善点にはどのようなものがあるかを明らかにすること、を目的とする。

  • 「複雑な意思決定」を支援するわかりやすいディシジョンエイドのチェックリスト開発

    2020.07
    -
    2023.03

    St. Luke's International University, Grants-in-Aid for Scientific Research, Grant-in-Aid for Challenging Research (Exploratory), No Setting

    　View Summary

    本研究の目的は、先進国で広く利用が進んできている患者中心の意思決定を支援するツールであるディシジョンエイド(decision aid)において、エビデンスが不十分で長所(利益)と短所(リスク)の不確実性が高い場合に、自分の価値観を中心に決める必要がある「複雑な意思決定」を、よりシンプルで、親しみやすく、わかりやすくするために必要な要件を探り、ディシジョンエイドのチェックリストを作成することである。ディシジョンエイドにおいて、日本人の半分が、確率情報の比較及び選択が困難な可能性があり、価値観の明確化を可能にする方法に関するエビデンスもない。わかりやすい方法を当事者への調査から明らかにする。

  • 日本人に不足するヘルスリテラシーを前提から支える意思決定スキル学習コンテンツ開発

    2020.04
    -
    2024.03

    St. Luke's International University, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), No Setting

    　View Summary

    本研究の目的は健康を決める力ヘルスリテラシー(HL)の根幹をなす、判断・意思決定が困難な日本人並びにその支援者の看護職に、HLの前提となる意思決定のスキルを学習するツール開発である。国際比較研究では日本人はEUやアジアよりHLが低く、死亡率の低下が鈍化し、慢性疾患の管理も悪く、喫煙率や自殺率は高く、警鐘が鳴らされている。しかし日本人は学校教育や生涯教育において、意思決定できることが幸せであること、その基本的な方法として選択肢を探し、それぞれの長所と短所を比較し自分の価値観に合ったものを選ぶことを学習する機会がない。これは意思決定を支援する看護職でも同様で、共にそれらを学び合うことを可能にする。

  • Development of an educational program on the systematic development and use of decision aids for healthcare professionals in oncology

    2018.04
    -
    2022.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, OSAKA Wakako, Grant-in-Aid for Scientific Research (C), Principal investigator

    　View Summary

    In this study, we developed and evaluated the acceptability of a web-based educational program on the systematic development and use of decision aids (DA) for healthcare professionals in oncology. Based on a needs assessment of healthcare professionals and information about existing educational programs, we designed a web-based educational program available to healthcare professionals not only in oncology but also in a variety of specialties. We conducted an acceptability study. A total of 4o participants completed the post-program acceptability survey. 90% of the participants were satisfied with the program. In addition, 90% of the participants indicated that they would like to use DA and 60% of the participants indicated that they would like to develop DA. Our findings suggest that this web-based educational program could improve learners' intentions to develop and use DA.

  • Intervention study of a shared decision-making educational program to reduce ethical conflict in obstetric care facilities

    2017.04
    -
    2022.03

    Niigata University, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Arimori Naoko, Grant-in-Aid for Scientific Research (B), No Setting

    　View Summary

    Objective: To clarify the reality of shared decision-making (SDM) in obstetrics and to evaluate SDM educational programs for healthcare professionals. Methods: (1) Web-based survey and interviews on SDM, and (2) evaluation of the program. Results: (1) Fifty-three healthcare professionals responded to the web survey (February 2021). The older they were and the more years of experience they had, the more they practiced SDM. 7 interviewees revealed problems and responses to SDM that support decision-making for both the expectant mother and the fetus, as well as situations requiring IP-SDM and responses. (2) The educational program (in October of the same year) was attended by 13 participants from two facilities. The "individual study" received high formative evaluations and the "group study" was conducted as planned, suggesting its feasibility of the program in clinical practice.

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Works 【 Display / hide 】

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Awards 【 Display / hide 】

  • SFC FACULTY AWARD 2021

    2022.03, 慶應義塾大学湘南藤沢キャンパス

  • 平成29年度看護学研究奨励賞

    2019.07, 一般社団法人日本私立看護系大学協会, 「Effect of a decision aid with patient narratives in reducing decisional conflict in choice for surgery among early-stage breast cancer patients: A three-arm randomized controlled trial」

  • 第10回看護のアイディアde賞「IT de 賞」

    2019.07, 国際モダンホスピタルショウ2017

  • 平成23年度日本がん看護学会学術奨励賞（教育・実践部門）

    2012.02

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Courses Taught 【 Display / hide 】

  • CHRONIC CARE NURSING

    2025

  • DEVELOPMENTAL ISSUES IN ADULT NURSING

    2025

  • THEORETICAL ISSUES IN GENETIC/GENOMIC NURSING

    2025

  • TERMINAL CARE NURSING

    2025

  • SENIOR PROJECT 2

    2025

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Courses Previously Taught 【 Display / hide 】

  • 成人看護学演習Ⅰ

    Keio University, Graduate School of Health Management

    2025
    -
    Present

  • 成人看護学演習Ⅱ

    Keio University

    2025
    -
    Present

  • 成人発達援助論

    Keio University

    2022
    -
    Present

  • フィジカルアセスメント

    Keio University

    2019
    -
    Present

  • 終末期看護学演習

    Keio University

    2019
    -
    Present

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Media Coverage 【 Display / hide 】

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Committee Experiences 【 Display / hide 】

  • 2025.04
    -
    Present

    専任査読者, 日本がん看護学会

  • 2025.02
    -
    Present

    代議員, 日本がん看護学会

  • 2024.06
    -
    Present

    評議員, 聖路加看護学会

  • 2024.05
    -
    Present

    企画委員会プログラム委員, 第45回日本看護科学学会学術集会

  • 2023.04
    -
    Present

    研究助成事業選考委員, 日本私立看護系大学協会

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