ReviewAnnals of clinical epidemiology2023
A Review of Studies Using Japanese Nationwide Administrative Claims Databases.
Review in Annals of clinical epidemiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
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
30 citing papers in PubMed.
- Changes in the Age Distribution of Radical Prostatectomy and Radical Cystectomy During the Diffusion of Robot-Assisted Surgery in Japan.Cancer medicine · 2026Article
- Nationwide trends in cardiac anesthesia requiring cardiopulmonary bypass and intraoperative transesophageal echocardiography use in Japan: a claims-based analysis, 2019-2023.Journal of anesthesia · 2026Article
- Comparison of oral third- versus first-/ second-generation cephalosporins for acute uncomplicated cystitis: a nationwide retrospective cohort study.European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology · 2026Article
- Age-Dependent Decline in Tonsillectomy and Adenoidectomy During the COVID-19 Pandemic in Japan: A Nationwide Longitudinal Analysis of NDB Open Data.Laryngoscope investigative otolaryngology · 2026Article
- Age-stratified risk of major systemic complications following unicompartmental versus total knee arthroplasty: a nationwide cohort study.Knee surgery & related research · 2026Article
- Age and Regional Trends in Groin Hernia Surgery in Japan: An Analysis of Laparoscopic Repair, Outpatient Surgery, and Manual Reduction Using National Database Open Data.Annals of gastroenterological surgery · 2026Article
- Risk of injury associated with the sedative potential of second-generation antihistamines: A nationwide retrospective cohort study.British journal of clinical pharmacology · 2026Article
- Validation of Recorded Diagnoses of Acute Kidney Injury Among Surgical Patients in the Japanese Diagnosis Procedure Combination Database.Journal of epidemiology · 2026Article
- Article
- Nationwide Comparison of ICU Procedure Frequencies in Japan Using a Public Open Database: A Cross-Sectional Study by ICU Admission Fee Type and Region.Journal of clinical medicine · 2026Article
- Safety of Short-Term Trimethoprim-Sulfamethoxazole Use for Uncomplicated Cystitis: A Nationwide Retrospective Cohort Study.Pharmacoepidemiology and drug safety · 2026Article
- Independent researchers in east Asian surgical research: structural barriers and potential policy pathways.Frontiers in research metrics and analytics · 2026Article
- Association between dispensing regulations for extended-release methylphenidate and prescription trends in Japan: an exploratory descriptive study.Journal of pharmaceutical health care and sciences · 2025Article
- Korea Disease Control and Prevention Agency Infectious Disease Big Data: Opening, Integration, Outcomes, and Future Directions.Jugan geon-gang gwa jilbyeong · 2025Article
- Rethinking the WHO AWaRe classification: the need for more detailed guidance.EClinicalMedicine · 2025Review
- Seasonality and Trend of Cellulitis, Herpes Zoster, and Varicella: A Nationwide Population-based Study.JMA journal · 2025Article
- Difference in Age- and Sex-adjusted Prevalence of Diseases between Employees and Nonemployees with Health Insurance in Japan.JMA journal · 2025Article
- Influence of statin intervention on peripheral neuropathy in patients treated with anticancer drugs identified from the insurer database.Journal of pharmaceutical health care and sciences · 2025Article
- Leveraging Administrative Health Databases to Address Health Challenges in Farming Populations: Scoping Review and Bibliometric Analysis (1975-2024).JMIR public health and surveillance · 2025Article
- The effect of antibiotic prescription in non-critically ill hospitalized patients with COVID-19: A Japanese inpatient database study.PloS one · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAdministrative claims databases are increasingly being used worldwide for research purposes. We reviewed original published articles that used one of the four nationwide administrative claims databases in Japan: the National Database of Health Insurance Claims and Specific Health Checkups (NDB), NDB Open Data, the JMDC Claims Database, and the Diagnosis Procedure Combination (DPC) database.
methodsStudies published from January 2010 to July 2022 using the JMDC and DPC databases, and from January 2013 to July 2022 using the NDB and NDB Open Data were identified using PubMed. The number of original articles was divided into 19 fields. The annual growth rate of the number of studies was calculated using the four databases.
resultsOverall, 1047 studies were included (95 for the NDB, 31 for the NDB Open Data, 222 for the JMDC database, and 699 for the DPC databases). Studies using one of these four databases increased from around 2010, and the average annual growth rate was approximately 41% from 2010 to 2021. DPC database studies had a higher proportion of articles on surgery (19.2%), urology (3.0%), neurosurgery (6.2%), anesthesiology (1.9%), and emergency medicine (14.0%), whereas the NDB and JMDC data had higher proportions of those regarding internal medicine.
conclusionsSince 2010, these four databases have increasingly attracted attention, and the number of studies using them has grown rapidly. Our review suggests that each has unique features, and researchers should understand the database characteristics to operate their studies.
Indexed as
Identifiers
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.