Updated on 2025/04/19

写真a

 
Nakatsuka Yuki
 
Organization
Scheduled update Special-Appointment Assistant Professor
Position
Special-Appointment Assistant Professor
External link

Degree

  • 専門職(社会健康医学) ( 2022.3   京都大学 )

Education

  • 京都大学大学院   医学研究科 社会健康医学系専攻   臨床統計家育成コース

    2020.4 - 2022.3

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Papers

  • Efficacy and safety of endoscopic ultrasonography-guided ethanol injections of small pancreatic neuroendocrine neoplasms: a prospective multicenter study Reviewed

    Kazuyuki Matsumoto, Hironari Kato, Takao Itoi, Masayuki Kitano, Kazuo Hara, Masaki Kuwatani, Mamoru Takenaka, Reiko Ashida, Shuntaro Mukai, Nozomi Okuno, Kazumichi Kawakubo, Tatsuhiro Yamazaki, Jun Sakurai, Yuki Nakatsuka, Michihiro Yoshida, Motoyuki Otsuka

    Endoscopy   57 ( 04 )   321 - 329   2025.1

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    Publishing type:Research paper (scientific journal)   Publisher:Georg Thieme Verlag KG  

    Abstract

    Endoscopic ultrasonography (EUS)-guided ethanol injection (EI) has recently been introduced as one of the management strategies for pancreatic neuroendocrine neoplasms (PNENs); however, its role as a surgical alternative is unclear. We evaluated the efficacy and safety of EUS-EI in treating small PNENs through a prospective multicenter study.

    Patients with grade 1 tumors of ≤15 mm confirmed by pathology were included. The primary end point assessed efficacy and safety, measuring complete ablation using computed tomography at 1 and 6 months, prevention of adverse events (AEs) within 1 month, severe pancreatic fistula at 1 month, and incidence/worsening of diabetes mellitus (DM) at 6 months. The composite end point of EUS-EI was compared with that of historical results of a study based on surgical treatment.

    25 patients with PNENs, with a median tumor size of 10.1 mm, were treated using EUS-EI. The composite primary end point was achieved by 76.0% of patients (19/25; 95%CI 54.9%–90.6%), a proportion significantly higher than that of surgical treatment (P = 0.008). Regarding efficacy, 88.0% (22/25) of patients achieved complete ablation at 1 and 6 months (95%CI 68.8%–97.5%). Regarding safety, 96.0% (24/25) of patients had no severe AEs within 1 month (95%CI 79.7%–99.9%). No patients had severe pancreatic fistulas at 1 month, and 84.0% (21/25) had no incidence or exacerbation, or both, of DM at 6 months (95%CI 63.9%–95.5%).

    EUS-EI is safe and could be a potent treatment option for patients with small PNENs.

    DOI: 10.1055/a-2452-4607

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  • Eight‐Year Outcomes of Cardiosphere‐Derived Cells in Single Ventricle Congenital Heart Disease Reviewed

    Kenta Hirai, Ryusuke Sawada, Tomohiro Hayashi, Toru Araki, Naomi Nakagawa, Maiko Kondo, Kenji Yasuda, Takuya Hirata, Tomoyuki Sato, Yuki Nakatsuka, Michihiro Yoshida, Shingo Kasahara, Kenji Baba, Hidemasa Oh

    Journal of the American Heart Association   13 ( 22 )   2024.11

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    Publishing type:Research paper (scientific journal)   Publisher:Ovid Technologies (Wolters Kluwer Health)  

    Background

    <p lang="en">Cardiosphere‐derived cell (CDC) infusion was associated with better clinical outcomes at 2 years in patients with single ventricle heart disease. The current study investigates time‐to‐event outcomes at 8 years.

    </p> Methods and Results

    <p lang="en"> This cohort enrolled patients with single ventricles who underwent stage 2 or stage 3 palliation from January 2011 to January 2015 at 8 centers in Japan. The primary outcomes were time‐dependent CDC treatment effects on death and late complications during 8 years of follow‐up, assessed by restricted mean survival time. Among 93 patients enrolled (mean age, 2.3±1.3 years; 56% men), 40 received CDC infusion. Overall survival for CDC‐treated versus control patients did not differ at 8 years (hazard ratio [HR], 0.60 [95% CI, 0.21–1.77]; P =0.35). Treatment effect had nonproportional hazards for death favoring CDCs at 4 years (restricted mean survival time difference +0.33 years [95% CI, 0.01–0.66]; P =0.043). In patients with heart failure with reduced ejection fraction, CDC treatment effect on survival was greater over 8 years (restricted mean survival time difference +1.58 years [95% CI, 0.05–3.12]; P =0.043). Compared with control participants, CDC‐treated patients showed lower incidences of late failure (HR, 0.45 [95% CI, 0.21–0.93]; P =0.027) and adverse events (subdistribution HR, 0.50 [95% CI, 0.27–0.94]; P =0.036) at 8 years.

    </p> Conclusions

    <p lang="en">By 8 years, CDC infusion was associated with lower hazards of late failure and adverse events in single ventricle heart disease. CDC treatment effect on survival was notable by 4 years and showed a durable clinical benefit in patients with heart failure with reduced ejection fraction over 8 years.

    </p> Registration

    <p lang="en"> URL: https://www.clinicaltrials.gov ; Unique identifiers: NCT01273857 and NCT01829750.

    </p>

    DOI: 10.1161/jaha.124.038137

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  • Predictors of discontinuation of osteoporosis treatment: sub-analysis of the Japanese osteoporosis intervention trial-05 (JOINT-05) Reviewed

    Yasuhiro Takeuchi, Yuki Nakatsuka, Shiro Tanaka, Tatsuhiko Kuroda, Hiroshi Hagino, Satoshi Mori, Satoshi Soen

    Journal of Bone and Mineral Metabolism   2024.8

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Introduction

    To identify predictors of discontinuing treatment with teriparatide (TPTD) and alendronate (ALN), data from a randomized, controlled trial (JOINT-05) involving postmenopausal Japanese women at high risk of fracture were re-analyzed.

    Materials and Methods

    Participants received sequential therapy with once-weekly TPTD for 72 weeks followed by ALN for 48 weeks (TPTD-ALN group) or monotherapy with ALN for 120 weeks (ALN group). Background data including comorbidities, fracture prevalence, cognitive function, quality of life, activities of daily living, bone metabolism parameters, and nutrient intake were collected. The endpoints were 3 types of discontinuations by the reason: a poor compliance, adverse events (AEs), or any reason including those unrelated to AEs or poor compliance. Odds ratios (ORs) of baseline predictors of discontinuation were evaluated by single or multiple regression analysis.

    Results

    A total of 234 (49.0%) patients in the TPTD-ALN group and 167 (34.2%) patients in the ALN group discontinued. In the TPTD-ALN group, a lower serum calcium level was a significant predictor of compliance-related discontinuation. Serum 25-hydroxyvitamin D levels were lower in patients with lower serum calcium levels than with higher serum calcium levels. In the ALN group, poor cognitive function was significantly associated with compliance-related discontinuation, and higher body mass index and alcohol intake were predictors of AE-related discontinuation. Predictors of discontinuation were drug-specific. Lower serum calcium levels and poor cognitive function were predictors of discontinuing once-weekly TPTD and ALN, respectively.

    Conclusion

    When starting TPTD and ALN treatment, careful attention to patients with lower serum calcium levels and poor cognitive function, respectively, may be needed for better treatment continuity.

    DOI: 10.1007/s00774-024-01541-3

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    Other Link: https://link.springer.com/article/10.1007/s00774-024-01541-3/fulltext.html

  • 骨粗鬆症臨床試験の方法 -a pragmatic approach- Reviewed

    The Journal of Japan osteoporosis Society   9 ( 2 )   103 - 111   2023.5

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Presentations

  • 若手統計家の今後-キャリア形成と展望について-

    中塚 夕貴, 坂本 航太, 齋多 遼太郎, 日髙 優, 中薗 孝輔, 三友 優治, 伊藤 知洋, 内藤 あかり

    日本臨床試験学会 第14回学術集会総会  2023.2.9 

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    Presentation type:Poster presentation  

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  • 若手生物統計家の育成環境のあり方に関する検討

    坂本 航太, 中塚 夕貴, 齋多 遼太郎, 日髙 優, 中薗 孝輔, 三友 優治, 伊藤 知洋, 内藤 あかり

    日本臨床試験学会 第14回学術集会総会  2023.2.9 

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    Presentation type:Poster presentation  

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  • 若手統計家の実態調査研究報告

    斎多遼太郎, 日高優, 坂本航太, 中園孝輔, 中塚夕貴, 三友優治

    ARO協議会第9回学術集会  2022.9.16 

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  • Time to eventをエンドポイントとするproportional hazardまたはnonproportional hazardの状況下での非劣性試験におけるサンプルサイズ設計

    中塚夕貴

    日本臨床試験学会 第13回学術集会総会  2022.2 

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  • 若手統計家の興味と関心:比例ハザード性が成り立たない下でのサンプルサイズ計算と npsurvSS の実装

    中塚夕貴

    ARO協議会第8回学術集会  2021.9 

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Awards

  • 海洋会賞

    2020.3   一般社団法人 海洋会  

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