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  1. Association of early cardiac rehabilitation on mortality in patients with dilated cardiomyopathy using national inpatient database

    Article • Scientific Reports, October 2025, Springer Science + Business Media

    Yuichi Nishioka

  2. Incidence and risk of cancer emergence among patients post-kidney transplantation in Japan

    Article • Clinical and Experimental Nephrology, August 2025, Springer Science + Business Media

    Yuichi Nishioka

  3. Risk of Thrombosis Associated with Oral Contraceptive Pills in Japan

    Article • August 2025, IOS Press

    Yuichi Nishioka

  4. Dietary Habits and Osteoporotic Fracture Risk: Retrospective Cohort Study Using Large-Scale Claims Data

    Article • Journal of the Endocrine Society, July 2025, Endocrine Society

    Yuichi Nishioka

  5. Trends in Diabetic Medication Use and Hypoglycemia Incidence Among Older Adults in Japan: A Retrospective Observational Study and a 10-Year Analysis Based on Level of Care Need Using Linked Medical and Long-Term Care Data

    Article • Cureus, July 2025, Springer Science + Business Media

    Yuichi Nishioka

  6. Anticoagulation Therapy for Atrial Fibrillation After Transcatheter Aortic Valve Replacement: National Database Insights

    Article • Journal of the American Heart Association, July 2025, Wolters Kluwer Health

    Yuichi Nishioka

  7. The Proportion of Coinfections Among Sexually Transmitted Infections in Japan: A Nationwide Claims Database Study

    Article • Open Forum Infectious Diseases, June 2025, Oxford University Press (OUP)

    Yuichi Nishioka

  8. Multiple or Single Endocrine Abnormalities Associated with Immune Checkpoint Inhibitors

    Article • The Journal of Clinical Endocrinology & Metabolism, June 2025, Endocrine Society

    Yuichi Nishioka

  9. Association Between Baseline Diabetes Therapy-Related Quality of Life (DTR-QOL) and Subsequent Risk of All-Cause Mortality: A Prospective Cohort Study (Diabetes Distress and Care Registry at Tenri [DDCRT 26])

    Article • Diabetes Therapy, June 2025, Springer Science + Business Media

    Yuichi Nishioka

  10. Current Practice of Guideline-Directed Medical Therapy After Acute Heart Failure Hospitalization

    Article • JACC Asia, June 2025, Elsevier

    Yuichi Nishioka

  11. Contemporary Use of Oral Inotropes in the Outpatient Treatment of Heart Failure: Analysis of a Japanese Nationwide Database

    Article • The Journal of Clinical Pharmacology, March 2025, Wiley

    Yuichi Nishioka

  12. Antiretroviral therapies and status of people living with HIV in Japan: An update from hospital survey and national database

    Article • PLOS One, January 2025, PLOS

    Yuichi Nishioka

  13. Persistence of newly prescribed 5-aminosalicylic acid in patients with ulcerative colitis: A nationwide comprehensive database study

    Article • PLOS One, December 2024, PLOS

    Yuichi Nishioka

  14. Analyzing Disparity in Geographical Accessibility to Home Medical Care Using a Claims Database: A Simulation Using Geographical Information System (Preprint)

    Article • JMIR Aging, December 2024, JMIR Publications Inc.

    Yuichi Nishioka

  15. Trends in the incidence of young-adult-onset diabetes by diabetes type: a multi-national population-based study from an international diabetes consortium

    Article • The Lancet Diabetes & Endocrinology, December 2024, Elsevier

    Yuichi Nishioka

  16. Immune checkpoint inhibitor‐related type 1 diabetes incidence, risk, and survival association

    Article • Journal of Diabetes Investigation, November 2024, Wiley

    Yuichi Nishioka

  17. Contemporary Use of β‐Blockers in Heart Failure Patients With and Without Atrial Fibrillation: A Nationwide Database Analysis

    Article • Clinical Pharmacology & Therapeutics, November 2024, Wiley

    Yuichi Nishioka

  18. Annual variation of estimated glomerular filtration rate in health check-ups associated with end-stage kidney disease

    Article • Scientific Reports, September 2024, Springer Science + Business Media

    Yuichi Nishioka

  19. Web-based questionnaire survey for exploring engagement characteristics of advance care planning in Japan: a cross-sectional study

    Article • BMC Research Notes, February 2024, Springer Science + Business Media

    Yuichi Nishioka

  20. Exact-matching algorithms using administrative health claims database equivalence factors for real-world data analysis based on the target trial emulation framework

    Article • Health Services and Outcomes Research Methodology, February 2024, Springer Science + Business Media

    Yuichi Nishioka

  21. Novel subgroups of obesity and their association with outcomes: a data-driven cluster analysis

    Article • BMC Public Health, January 2024, Springer Science + Business Media

    Yuichi Nishioka

  22. Insights from the trends of omalizumab and mepolizumab utilization in patients with asthma: A population-based cohort study using the National Database in Japan

    Article • Respiratory Investigation, January 2024, Elsevier

    Yuichi Nishioka

  23. Oral anticoagulation after atrial fibrillation catheter ablation: benefits and risks

    Article • European Heart Journal, December 2023, Oxford University Press (OUP)

    Yuichi Nishioka

  24. Antithyroid drug-induced leukopenia and G-CSF administration: a long-term cohort study

    Article • Scientific Reports, November 2023, Springer Science + Business Media

    Yuichi Nishioka

  25. Clinical impact of the intensity of follow-up cystoscopy in patients with high-risk non-muscle-invasive bladder cancer

    Article • International Urology and Nephrology, November 2023, Springer Science + Business Media

    Yuichi Nishioka

  26. Risk factors for mortality after hip fracture surgery in Japan using the National Database of Health Insurance Claims and Specific Health Checkups of Japan

    Article • Archives of Osteoporosis, July 2023, Springer Science + Business Media

    Yuichi Nishioka

  27. Sodium–glucose cotransporter 2 inhibitor use in early-phase acute coronary syndrome with severe heart failure

    Article • European Heart Journal - Cardiovascular Pharmacotherapy, May 2023, Oxford University Press (OUP)

    Yuichi Nishioka

  28. Research note changes in the number of outpatient visits in Japan during the COVID-19 pandemic

    Article • BMC Research Notes, May 2023, Springer Science + Business Media

    Yuichi Nishioka

  29. Reduction in Planned Percutaneous Coronary Interventions After the Policy Change for Ischemia Assessment in Japan

    Article • JACC Asia, April 2023, Elsevier

    Yuichi Nishioka

  30. Hospital- and Patient-Level Analysis of Quality Indicators in Acute Coronary Syndrome Care: A Nationwide Database Study

    Article • Canadian Journal of Cardiology, April 2023, Elsevier

    Yuichi Nishioka

  31. Risk of Lactic Acidosis in Hospitalized Diabetic Patients Prescribed Biguanides in Japan: A Retrospective Total-Population Cohort Study

    Article • International Journal of Environmental Research and Public Health, March 2023, MDPI AG

    Yuichi Nishioka

  32. Validity of Diagnostic Algorithms for Cardiovascular Diseases in Japanese Health Insurance Claims

    Article • Circulation Journal, March 2023, Japanese Circulation Society

    Yuichi Nishioka

  33. Trends and Factors Associated With Cardiac Rehabilitation Participation　― Data From Japanese Nationwide Databases ―

    Article • Circulation Journal, November 2022, Japanese Circulation Society

    Yuichi Nishioka

  34. Multifactorial effects of outpatient cardiac rehabilitation in patients with heart failure: a nationwide retrospective cohort study

    Article • European Journal of Preventive Cardiology, November 2022, Oxford University Press (OUP)

    Yuichi Nishioka

  35. FORECASTING THE REGIONAL DISTRIBUTION OF HOME CARE PATIENTS USING BIG DATA OF INSURANCE CLAIMS IN JAPAN: 2015 TO 2045

    Article • Innovation in Aging, November 2022, Oxford University Press (OUP)

    Yuichi Nishioka

  36. Rehabilitation services and related health databases, Japan

    Article • Bulletin of the World Health Organization, November 2022, WHO Press

    Yuichi Nishioka

  37. Age-dependent association of discharge heart-failure medications with clinical outcomes in a super-aged society

    Article • Biomedicine & Pharmacotherapy, November 2022, Elsevier

    Yuichi Nishioka

  38. Risks of Myocarditis and Pericarditis Following Vaccination with SARS-CoV-2 mRNA Vaccines in Japan: An Analysis of Spontaneous Reports of Suspected Adverse Events

    Article • Therapeutic Innovation & Regulatory Science, October 2022, Springer Science + Business Media

    Yuichi Nishioka

  39. Sensitivity and specificity analyses of COVID-19 screening protocol for emergency medical services: A STARD-compliant population-based retrospective study

    Article • Medicine, October 2022, Wolters Kluwer Health

    Yuichi Nishioka

  40. Contemporary use of SGLT2 inhibitors in heart failure patients with diabetes mellitus: a comparison of DPP4 inhibitors in a nationwide electric health database of the superaged society

    Article • Cardiovascular Diabetology, August 2022, Springer Science + Business Media

    Yuichi Nishioka

  41. Evaluation of adrenaline auto-injector prescription profiles: A population-based, retrospective cohort study within the National Insurance Claims Database of Japan

    Article • Allergology International, July 2022, Elsevier

    Yuichi Nishioka

  42. The impact of hospital case volume on the outcomes after catheter ablation for atrial fibrillation according to the ablation technology

    Article • Journal of Cardiovascular Electrophysiology, April 2022, Wiley

    Yuichi Nishioka

  43. The age of death in Japanese patients with type 2 and type 1 diabetes: A descriptive epidemiological study

    Article • Journal of Diabetes Investigation, April 2022, Wiley

    Yuichi Nishioka

  44. Outpatient cardiac rehabilitation dose after acute coronary syndrome in a nationwide cohort

    Article • Heart, March 2022, BMJ

    Yuichi Nishioka

  45. Tracing all patients who received insured dialysis treatment in Japan and the present situation of their number of deaths

    Article • Clinical and Experimental Nephrology, January 2022, Springer Science + Business Media

    Yuichi Nishioka

  46. Development of a New Method to Trace Patient Data Using the National Database in Japan

    Article • Advanced Biomedical Engineering, January 2022, Japanese Society for Medical and Biological Engineering

    Yuichi Nishioka

  47. Comparison of Japanese Centenarians’ and Noncentenarians’ Medical Expenditures in the Last Year of Life

    Article • JAMA Network Open, November 2021, American Medical Association (AMA)

    Yuichi Nishioka

  48. Association between dipeptidyl peptidase‐4 inhibitors and increased risk for bullous pemphigoid within 3 months from first use: A 5‐year population‐based cohort study using the Japanese National Database

    Article • Journal of Diabetes Investigation, October 2021, Wiley

    Yuichi Nishioka

  49. Association between prophylactic antibiotic use for transarterial chemoembolization and occurrence of liver abscess: a retrospective cohort study

    Article • Clinical Microbiology and Infection, October 2021, Elsevier

    Yuichi Nishioka

  50. Appropriate definition of diabetes using an administrative database: A cross‐sectional cohort validation study

    Article • Journal of Diabetes Investigation, August 2021, Wiley

    Yuichi Nishioka

  51. Incidence of lower limb amputation in people with and without diabetes: a nationwide 5-year cohort study in Japan

    Article • BMJ Open, August 2021, BMJ

    Yuichi Nishioka

  52. Influenza and type 1 diabetes

    Article • Journal of Diabetes Investigation, April 2021, Wiley

    Yuichi Nishioka

  53. Current Status and Effect of Outpatient Cardiac Rehabilitation After Percutaneous Coronary Intervention in Japan

    Article • Circulation Reports, March 2021, Japanese Circulation Society

    Yuichi Nishioka

  54. Long‐term prognosis of enteral feeding and parenteral nutrition in a population aged 75 years and older: a population‐based cohort study

    Article • BMC Geriatrics, January 2021, Springer Science + Business Media

    Yuichi Nishioka

  55. Evaluation of Public Health Expenditure by Number of Teeth among Outpatients with Diabetes Mellitus

    Article • The Bulletin of Tokyo Dental College, January 2021, Tokyo Dental College

    Yuichi Nishioka

  56. Quality of Life and Utility Values for Cost-Effectiveness Modeling in Japanese Patients with Type 2 Diabetes

    Article • Diabetes Therapy, October 2020, Springer Science + Business Media

    Yuichi Nishioka

  57. Incidence and seasonality of type 1 diabetes: a population-based 3-year cohort study using the National Database in Japan

    Article • BMJ Open Diabetes Research & Care, September 2020, BMJ

    Yuichi Nishioka

  58. Evaluation of tooth loss among patients with diabetes mellitus using the National Database of Health Insurance Claims and Specific Health Checkups of Japan

    Article • International Dental Journal, August 2020, Elsevier

    Yuichi Nishioka

  59. Absolute risk of acute coronary syndrome after severe hypoglycemia: A population‐based 2‐year cohort study using the National Database in Japan

    Article • Journal of Diabetes Investigation, November 2019, Wiley

    Yuichi Nishioka

  60. Data regarding fracture incidence according to fracture site, month, and age group obtained from the large public health insurance claim database in Japan

    Article • Data in Brief, April 2019, Elsevier

    Yuichi Nishioka

  61. Variation in fracture risk by season and weather: A comprehensive analysis across age and fracture site using a National Database of Health Insurance Claims in Japan

    Article • Bone, March 2019, Elsevier

    Yuichi Nishioka

  62. National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB): Outline and Patient-Matching Technique

    Article • March 2018, Cold Spring Harbor Laboratory Press

    Yuichi Nishioka

  63. <i>Mycobacterium wolinskyi</i> Peritonitis after Peritoneal Catheter Embedment Surgery

    Article • Internal Medicine, January 2017, Japanese Society of Internal Medicine

    Yuichi Nishioka