ReviewJMA journal2024
Literature Review of Studies Using the National Database of the Health Insurance Claims of Japan (NDB): Limitations and Strategies in Using the NDB for Research.
Review in JMA journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
21 citing papers in PubMed.
- Association between hospital bed attainment rates and the density of healthcare professionals in Japan: A nationwide ecological study.Health policy OPEN · 2026Article
- Long-term National Trends in Pediatric Oral Antibiotic Prescriptions in Japan, 2011-2022.JMA journal · 2026Article
- Feasibility of a Monthly Morphine Milligram Equivalent Metric for Opioid Surveillance Using the National Claims Database of Japan: A Repeated Cross-Sectional Study in a Low-Consumption Setting.Therapeutic innovation & regulatory science · 2026Article
- Laparoscopic liver resection for patients with intrahepatic cholangiocarcinoma using data from the Japanese National Database: A nationwide observational study.Global health & medicine · 2026Article
- Clinical artificial intelligence (AI) in Japan: Regulatory pathways, domain-specific evidence, and its data infrastructure from an international perspective.Global health & medicine · 2026Review
- Uncommon Combination of Low Alanine Aminotransferase and High Fatty Liver Index Associated With High Charlson Comorbidity Index: Insights From the K7Ps-Study-7.Journal of clinical medicine research · 2026Article
- Negative health outcomes of non-response to the Kihon checklist in community-dwelling older people: a 19-month prospective cohort study.BMC geriatrics · 2026Article
- Real-world medical expenses of hematopoietic stem cell transplantation in Japan: a nationwide database study.Bone marrow transplantation · 2026Article
- Disparities in sleep medicine in Japan: association between CPAP prescriptions and the number of certified sleep medicine providers.Sleep & breathing = Schlaf & Atmung · 2025Article
- Evaluation of the geographic distribution of patients with hepatocellular carcinoma and treatments in Japan using data from the Japanese national database.Global health & medicine · 2025Article
- Seasonality and Trend of Cellulitis, Herpes Zoster, and Varicella: A Nationwide Population-based Study.JMA journal · 2025Article
- State of groin hernia repair in Japan: Annual Report of 2022 from the National Clinical Database.Surgery today · 2025Article
- Changes in proportions of Cesarean section before and during the COVID-19 pandemic in Japan.The journal of obstetrics and gynaecology research · 2025Observational
- Article
- Trends in the Use of a Financial Incentive for Device-assisted Rehabilitation in Japan: A Descriptive Analysis Using National Health Insurance Data.Progress in rehabilitation medicine · 2025Article
- Regulatory-required post-marketing database studies in Japan could be leveraged to assess important potential risks as well as identified risks.Frontiers in pharmacology · 2025Article
- Analysis of recent changes in treatment options for patients with hepatocellular carcinoma using data from a highly comprehensive Japanese national database: Impact of advances in systemic therapy and minimally invasive surgery.Global health & medicine · 2024Article
- Impact of new antifungal medications on onychomycosis prescriptions and costs in Japan: A nationwide claims database study.The Journal of dermatology · 2024Article
- Real-World Research on Retinal Diseases Using Health Claims Database: A Narrative Review.Diagnostics (Basel, Switzerland) · 2024Review
- A new electronic medical record database linked to claims data and discharge abstract data (the RWD database) in Japan: Study design and profile.Annals of clinical epidemiology · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The use of the National Database of Health Insurance Claims and Specific Health Checkups of Japan (NDB) for research has increased over time. Researchers need to understand the characteristics of the data to generate quality-assured evidence from the NDB. In this review, we mapped and characterized the limitations and related strategies using the NDB for research based on the descriptions of published NDB studies. To find studies that used Japanese healthcare claims data, we searched MEDLINE, EMBASE, and Ichushi-Web up to June 2023. Additionally, we hand-searched the NDB data publication list from the Ministry of Health, Labour and Welfare (2017-2023). We abstracted data based on the NDB data type, research themes, age of the study sample or population, targeted disease, and the limitations and strategies in the NDB studies. Ultimately, 267 studies were included. Overall, the most common research theme was describing and estimating the prescriptions and treatment patterns (125 studies, 46.8%). There was a variation in the frequency of themes according to the type of NDB data. We identified the following categories of limitations: (1) lack of information on confounders/covariates, outcomes, and other clinical content, (2) limitations regarding patients not included in the NDB, (3) misclassification of data, (4) lack of unique identifiers and register of beneficiaries, and (5) others. Although the included studies noted several limitations of using the NDB for research, they also provided some strategies to address them. Organizing the limitations of NDB in research and the related strategies across research fields can help support high-quality NDB studies.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.