Pharmacoepidemiology and Drug Safety最新文献

{"title":"Correction to \"Benzodiazepine Initiation Effect on Mortality Among Medicare Beneficiaries Post-Acute Ischemic Stroke\".","authors":"","doi":"10.1002/pds.70218","DOIUrl":"https://doi.org/10.1002/pds.70218","url":null,"abstract":"","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70218"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144964203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Risk Factors for Serious Hypotension Induced by Intravenous Acetaminophen in Patients With Hematologic Malignancy.","authors":"Yu-Ri Choi, Ji-In Park, Seong-Sim An, Ji-Hye Choi, Mi-Na Min, Jin-Suk Kang, Jee-Eun Chung","doi":"10.1002/pds.70210","DOIUrl":"https://doi.org/10.1002/pds.70210","url":null,"abstract":"<p><strong>Purpose: </strong>Owing to their rapid antipyretic effects and predictable pharmacokinetic properties, acetaminophen (AAP) are commonly administered intravenously to severely ill patients. However, the potential development of hypotension as a consequence of intravenous AAP administration has not been thoroughly addressed. In this study, we aimed to identify the risk factors associated with the occurrence of serious hypotension following intravenous AAP administration during fever in patients with hematologic malignancies.</p><p><strong>Methods: </strong>This retrospective study included hospitalized patients in the hemato-oncology department. Patients were evaluated for serious adverse drug reactions (ADRs) resulting from intravenous administration of AAP between January and December 2023 at a tertiary hospital. The control group comprised patients who received intravenous AAP but did not experience hypotension. After univariable analysis, multivariable analysis was performed to identify the risk factors for serious hypotension.</p><p><strong>Results: </strong>The serious hypotension group included 37 patients, while the control group had 111 patients randomized in a 1:3 ratio based on age and sex. Three risk factors were identified as increasing the likelihood of serious hypotension: body temperature prior to administration, acute kidney injury, and bacteremia. The mean arterial pressure prior to administration decreased the risk of developing serious hypotension by 0.96 times with an increase of 1 mmHg. There were no significant differences in the length of hospitalization or 90-day mortality between the two groups.</p><p><strong>Conclusions: </strong>Given that patients with hematologic malignancies and associated risk factors may develop serious hypotension that can lead to death, it is essential to closely monitor blood pressure during intravenous administration of AAP.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70210"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12377936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144964218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Additional Risk Minimization Measures Related to Interstitial Lung Disease/Pneumonitis With Trastuzumab Deruxtecan Treatment of Breast Cancer in European Countries: Results and Learnings From a Post-Authorization Safety Survey Among Physicians.","authors":"Angelika Wientzek-Fleischmann, Ulf Stellmacher, Elisabeth Beyerlein, Annegret Gohlke, Birgit Ehlken","doi":"10.1002/pds.70206","DOIUrl":"10.1002/pds.70206","url":null,"abstract":"<p><strong>Background: </strong>Interstitial lung disease (ILD)/pneumonitis is an important safety risk of trastuzumab deruxtecan (T-DXd) treatment. This study assessed the effectiveness of additional risk minimization measures (aRMMs) outlined in the educational material (EM) for the product regarding physicians' awareness, knowledge, and implementation related to the risk, early detection, and management of ILD/pneumonitis.</p><p><strong>Methods: </strong>A web-based survey was conducted among prescribers of T-DXd from seven European countries (Austria, Denmark, France, Germany, Sweden, Spain, and the UK) between 03/2021 and 11/2022. The overall effectiveness of the aRMMs was determined as the percentage of physicians correctly responding to questions in the awareness, knowledge, and implementation domains, with cut-off thresholds of ≥ 80%, ≥ 60%, and ≥ 75%, respectively.</p><p><strong>Results: </strong>Overall, 172 prescribing physicians from seven countries completed the survey questionnaire (response rate: 3.1%). The majority (73.8%) of the physicians acknowledged receiving EMs. In all, 91.6%, 46.7%, and 76.7% of the physicians correctly responded to questions in the awareness, knowledge, and implementation domains, respectively. The low score observed in the knowledge domain was primarily because the respondents did not acknowledge fever as a typical symptom of ILD/pneumonitis. When a post hoc sensitivity analysis was performed where \"fever\" was not classified as a mandatory answer to the question about typical symptoms for ILD/pneumonitis, the proportion of physicians achieving the threshold increased to 68.6%.</p><p><strong>Conclusion: </strong>The aRMMs effectively imparted awareness and supported the management of T-DXd-induced ILD/pneumonitis.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70206"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12426362/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145040891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TriNetX Dataworks-USA: Overview of a Multi-Purpose, De-Identified, Federated Electronic Health Record Real-World Data and Analytics Network and Comparison to the US Census.","authors":"Ellen Stein, Matthias Hüser, E Susan Amirian, Matvey B Palchuk, Jeffrey S Brown","doi":"10.1002/pds.70198","DOIUrl":"10.1002/pds.70198","url":null,"abstract":"<p><strong>Introduction: </strong>Many clinical data networks often focus on a single use-case or disease. By contrast, the TriNetX Dataworks-USA Network contains real-world clinical information that can be applied to multiple research questions and use cases. The purpose of this study is to describe the Network's characteristics, as well as its generalizability to the US population, particularly the healthcare-seeking population.</p><p><strong>Methods: </strong>Using the Dataworks-USA Network, a large, regularly updated data network containing de-identified patient electronic health record (EHR) information from across the United States, basic demographics were summarized and compared to the US Census Bureau International Database (IDB) 2022 data and the National Cancer Institute's version of the Census Bureau's U.S. County Population Data for 2022 to examine the generalizability of the Network.</p><p><strong>Results: </strong>Patients in the Dataworks-USA Network are approximately 5 years older than the Census, and the Network has a larger proportion of female patients. The Network has a lower proportion of patients identified as Asian and White race, and a higher proportion who identify as other relative to the Census; other races are similar between the two data sources (< 1% difference). Regionally, Dataworks-USA has a smaller proportion of patients in all race categories compared with the Census due to the larger proportion of patients of Unknown or Other race.</p><p><strong>Conclusions: </strong>TriNetX's Dataworks-USA Network provides a robust data source for many use cases and is broadly generalizable to the US population, particularly the healthcare-seeking population, with differences related to the underlying nature of the data sources.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70198"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12414656/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145016088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Real-World Use of Biologic and Targeted Synthetic Disease-Modifying Antirheumatic Drugs in Patients With Axial Spondyloarthritis in the United States: Persistence, Variables Associated With Persistence, and Dosing Variations.","authors":"Maureen Dubreuil, Jessica A Walsh, Atul Deodhar, Lianne S Gensler, Jeffrey R Curtis, Sarah Welby, Olga Pilipczuk, Silky Beaty, Michael F Mørup, Vanessa Taieb, Suzanne Anjohrin","doi":"10.1002/pds.70197","DOIUrl":"https://doi.org/10.1002/pds.70197","url":null,"abstract":"<p><strong>Objective: </strong>The objective of this study was to evaluate 12-month persistence of biologic and targeted synthetic disease-modifying antirheumatic drug (b/tsDMARD) treatment in US patients with axial spondyloarthritis (axSpA) using real-world data, and patient baseline characteristics associated with increased or decreased persistence probability.</p><p><strong>Methods: </strong>Anonymized US claims from Merative MarketScan provided patient data relative to an index date (initiation of a new b/tsDMARD of interest for axSpA), from which patients were followed for 12 months or until b/tsDMARD non-persistence (≥ 90-day gap or b/tsDMARD switch) or MarketScan disenrollment. Persistence probabilities were estimated using Kaplan-Meier survival curves. Association of variables with persistence was estimated using multivariable Cox regression analyses.</p><p><strong>Results: </strong>Of the 5970 adults with axSpA, 76.7% were prescribed a TNFi as their index b/tsDMARD, and 55.1% were b/tsDMARD-unexposed while 44.9% were b/tsDMARD-exposed before index b/tsDMARD. b/tsDMARD persistence probability was 67.8%, 57.7%, and 54.4% at 6, 9, and 12 months, respectively. 12-month persistence probabilities stratified by index b/tsDMARD mode of action or history of b/tsDMARD treatment ranged from 51.8% to 55.7%. Female sex and history of dactylitis were associated with decreased b/tsDMARD persistence, while history of inflammatory bowel disease, uveitis, and obesity were associated with increased persistence probability.</p><p><strong>Conclusions: </strong>Around half of patients studied were non-persistent with any given b/tsDMARD within a year of initiating therapy. Persistence was not considerably affected by index b/tsDMARD mode of action or history of b/tsDMARD treatment. Patient characteristics associated with decreased persistence probability, including female sex and dactylitis, may help clinicians recognize patients who may benefit from additional support to improve long-term treatment outcomes.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70197"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144964166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prescription Drugs in Pregnancy and Congenital Malformations: A Population-Based Safety Screening Study.","authors":"Anne Broe, Anton Pottegård, Trine Munk-Olsen, Jesper Hallas, Mette Bliddal, Irene Petersen, Per Damkier","doi":"10.1002/pds.70211","DOIUrl":"https://doi.org/10.1002/pds.70211","url":null,"abstract":"<p><strong>Background: </strong>Counseling women who are either pregnant or contemplating pregnancy on their use of prescribed drugs remains a major clinical challenge. Since the thalidomide tragedy in the 1960s, the use of drugs during pregnancy has been subject to widespread concern due to the potential for unwanted effects on the unborn child, notably major congenital malformations.</p><p><strong>Objective: </strong>To examine the risk of major congenital malformations following first trimester exposure to all marketed prescription drugs in Denmark.</p><p><strong>Study design: </strong>This was a population-based cohort study utilizing national health registries in Denmark. We studied all singleton livebirths in Denmark between January 1, 2004, and December 31, 2017, and we linked data from the National Danish Prescription Register, Birth Register, Patient Register, and Cause of Death Register. Using logistic regression analysis, we compared exposed liveborn to unexposed liveborn children while controlling for important confounders. The main outcome measure was major congenital malformations, and the secondary outcomes included organ-specific major congenital malformations as defined by EUROCAT.</p><p><strong>Results: </strong>Of 326 drugs with at least 5 livebirths with major congenital malformations, 31 were associated with an increased risk of major congenital malformations compared to unexposed livebirths (adjusted Odds Ratio [aOR] ≥ 2.0). Compared to livebirths of women who discontinued treatment prior to pregnancy, 17 drugs with an increased risk (aOR ≥ 2.0) were identified. Among 115 drugs prescribed to ≥ 1000 women during the first trimester, only insulins had aORs ≥ 2.0 for overall major congenital malformations. There were > 100 drugs with no increased risk of major congenital malformations.</p><p><strong>Conclusions: </strong>Using a complete nationwide dataset, > 100 null-associations between first-trimester drug exposure and overall major congenital malformations were documented. This provides important insights and reassurance to support pregnant women and inform shared decision making. We confirm previously known teratogenic drugs and other potential teratogenic drugs, clopidogrel and liraglutide, were identified. These latter associations should be addressed in future studies using disease-specific confounder control.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70211"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12381547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144964150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential Drug Dose-Specific Adverse Three-Drug Combinations: A US Insurance Claims Data-Based Study.","authors":"Y Shi, A Sun, C W Chiang, Y Yang, K M Hunold, J Xu, M Russo, J Caterino, M T Eadon, L Li, J Su, M Donneyong, P Zhang","doi":"10.1002/pds.70199","DOIUrl":"10.1002/pds.70199","url":null,"abstract":"<p><strong>Introduction: </strong>Use of three-drug combinations is increasingly prevalent and associated with an increased risk of adverse drug events (ADEs). While real-world data-based pharmacovigilance and pharmacoepidemiology studies have derived knowledge on potential adverse three-drug combinations, the relationship between doses of each drug in three-drug combination exposure and the risk of ADEs remains unclear.</p><p><strong>Methods: </strong>We derived matched case-control datasets from US nationwide health insurance claims data for potential ADEs including acute kidney injury, acute myocardial infarction, gastrointestinal bleeding, hypoglycemia, and opioid-related ADE. We used the conditional logistic regression model to investigate the relationship between the dose of three-drug combination exposure and the risk of ADE. We used Benjamini and Hochberg's procedure to control the false discovery rate (FDR). We explored the relationship between the reduction of drug dose and the risk of ADE.</p><p><strong>Results: </strong>We identified over 500 potential adverse three-drug combinations from approximately two million case-control pairs (all odds ratios ≥ 1.3 and FDR < 0.05). For the signals, compared with a high-dose level of all three drugs, 74% of three-drug combinations had a lower risk by decreasing the dose of one drug without any drug discontinuation (p value < 0.05).</p><p><strong>Conclusions: </strong>Certain three-drug combinations are associated with an increased risk of ADE. Dose of exposure might be used to evaluate the risk of ADE for a majority of adverse three-drug combinations.</p><p><strong>Plain language summary: </strong>Use of three-drug combinations is increasingly prevalent and associated with an increased risk of adverse drug events (ADEs). We identified potential adverse three-drug combinations from real-world data, and revealed the corresponding relationships between doses and risks of ADEs. We find doses might be used to evaluate the risk of ADE for many adverse three-drug combinations. Additionally, we find risk of many adverse three-drug combinations might be decreased by reducing the dose of one drug without any drug discontinuation.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70199"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12358767/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144874484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Systematic Review of Algorithms for Identifying Pediatric Neurodevelopmental Outcomes.","authors":"Sandra Lopez-Leon, Xuerong Wen, Sneha Gaitonde, Ana Sofia Afonso, Sandrine Colas, Rachael L DiSantostefano, Marie-Laure Kürzinger, Maryline Le Noan-Lainé, Vera Ruth Mitter, Gayle Murray, Meritxell Sabidó, Julie Scotto, Melanie H Jacobson, Rebecca L Bromley, Amir Sarayani","doi":"10.1002/pds.70196","DOIUrl":"10.1002/pds.70196","url":null,"abstract":"<p><strong>Purpose: </strong>Investigating pediatric neurodevelopmental outcomes (NDO) in studies using secondary data is often challenging due to heterogeneous clinical definitions and medical coding systems. This study aims to identify the algorithms used to define NDO in studies using electronic healthcare data through a systematic literature review.</p><p><strong>Methods: </strong>A search strategy was developed to identify studies on NDO that describe phenotype algorithms from January 1, 2010, to March 10, 2025. The search strategy included terms to identify studies containing algorithms for NDO as an outcome, routinely collected healthcare data, epidemiologic designs likely to incorporate algorithms, and pregnant individuals and/or infants/children. Two independent reviewers assessed eligibility criteria and performed data extraction, with inconsistencies reviewed by a third reviewer. Descriptive statistics were used to summarize categorical and continuous variables appropriately.</p><p><strong>Results: </strong>The review included 156 publications that implemented algorithms for NDO, with 18 of these studies validating the outcomes. Most publications studied autism spectrum disorder (ASD) (n = 103, 65.6%) and attention deficit hyperactivity disorder (ADHD) (n = 72, 45.9%) either as a single outcome or as a composite.</p><p><strong>Conclusions: </strong>Instead of presenting NDO as a composite outcome, it is recommended to present multiple single outcomes. Validated outcomes in data from Nordic countries demonstrate a high positive predictive value when using one code for diagnoses, while more complex algorithms are required for US data. Clearly detailing and establishing the time of assessment for each NDO is critical to inform valid epidemiological estimates.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70196"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12445936/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145086273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing Two Approaches to Identify Individuals with Severe Asthma in United States Claims Data.","authors":"Julie Barberio, Xinyu Li, Sarah-Jo Sinnott","doi":"10.1002/pds.70220","DOIUrl":"https://doi.org/10.1002/pds.70220","url":null,"abstract":"<p><strong>Purpose: </strong>Given the increased likelihood for individuals with severe asthma to experience comorbidities, disease complications, emergency room visits, and hospitalizations, the ability to stratify asthma populations on severity is often important. Although pharmacoepidemiologic studies using administrative healthcare databases sometimes categorize asthma severity, there is no consensus on an approach.</p><p><strong>Methods: </strong>Individuals with asthma (≥ 2 ICD-10-CM diagnosis codes J45) aged ≥ 6 years were identified in Optum's de-identified Clinformatics Data Mart Database between January 2017 and November 2023. Severe asthma was inferred, consistent with the Global Initiative for Asthma (GINA), from prescription claims for high-dose inhaled corticosteroids (ICS) in combination with long-acting beta-agonists (LABA) (Step 5 treatment). Two algorithm versions were employed to isolate the impact of dose estimation methods: (1) the \"code-based method\" considered high-dose ICS-LABA to be an inhaler property and defined severe asthma based on claims for ICS-LABA from our pre-determined list; (2) the \"calculation-based method\" considered high-dose ICS-LABA to be a regimen property and defined severe asthma based on derived patient-level average daily dose.</p><p><strong>Results: </strong>A total of 1 221 732 individuals with asthma were identified, 3.1% of which were severe by the code-based method and 4.2% by the calculation-based method. Both methods appeared to be consistent with the benchmark cited by GINA (3.7%). No meaningful differences were observed in the characteristics of the cohorts. 27% of calculation-based individuals with severe asthma were not captured by the code-based method.</p><p><strong>Conclusions: </strong>Estimating patient-level average daily ICS dose based on prescription claims using either a code-based or a calculation-based algorithm appears to be a reasonable method to identify individuals with severe asthma. The discrepancy between methods suggests that physician instructions sometimes vary from recommended administration instructions. Future work will validate these algorithms using electronic medical records.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70220"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145033858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"10 Practical Considerations for the Conduct of Multi-National/Database Studies in Pharmacoepidemiology.","authors":"Kenneth K C Man, Anton Pottegård","doi":"10.1002/pds.70203","DOIUrl":"10.1002/pds.70203","url":null,"abstract":"<p><strong>Background: </strong>Multi-national/database pharmacoepidemiological studies are increasingly used to address questions that require pooled evidence across populations but introduce challenges in design, harmonization, and analysis.</p><p><strong>Objective: </strong>To share 10 practical considerations and common pitfalls in planning, executing, and reporting multi-national/database studies, with strategies to mitigate them.</p><p><strong>Approach: </strong>Practical guidance article synthesizing experience from multi-national/database projects and literature-based exemplars; no original data collection.</p><p><strong>Results: </strong>We summarize ten considerations spanning: protocol development; follow-up time and eligibility assessment; data harmonization (including thorough metadata and master mapping tables); feasibility checks within each source; statistical model diagnostics; and transparent reporting. We illustrate how local clinical practices, coding systems, and reimbursement policies can shape outcomes and interpretation, and we emphasize the need for proactive, consistent communication among collaborators to ensure aligned implementation.</p><p><strong>Conclusion: </strong>Multi-national/database studies are complex but feasible with structured planning, clear communication, and proactive problem-solving. Adopting the outlined practices can reduce avoidable heterogeneity and improve the robustness and interpretability of findings.</p>","PeriodicalId":19782,"journal":{"name":"Pharmacoepidemiology and Drug Safety","volume":"34 9","pages":"e70203"},"PeriodicalIF":2.4,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12399347/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144964157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}