Methods in Pharmacoepidemiology

(P-005) Multimorbidity Measures from Health Administrative Data: A Systematic Review

(P-023) Handling with Vaccine Type Missing Data in a Dynamic Cohort to Assess the Link Between Time-varying Vaccination and an Autoimmune Disease

(P-027) Four Competing Definitions of Morphine Equivalence Insidiously Inhibit Evidence Synthesis

(P-056) Genetic Heterogeneity Patterns of Electronic Medical Record (EMR)-Derived Race Groups in a Deidentified Clinico-genomic Database (CGDB)

(P-070) Risk of Thrombotic Microangiopathy with Tyrosine Kinase Inhibitors: A Disproportionality Analysis from Vigibase and AERS Databases

(P-080) Validation of Self-reported Medication Use Applying Untargeted Mass Spectrometry-based Metabolomics Techniques in the Rhineland Study

(P-085) Trajectories of oral budesonide use in Crohn's disease cohort of Tuscan patients (Italy)

(P-092) Primary Non-adherence in Primary Care in the Netherlands

(P-095) Fracture Outcome Coding in Observational Osteoporosis Drug Effects Studies: A Scoping Review

(P-102) Determining the Accuracy of Developing New User Cohorts Using Electronic Health Record Data

(P-103) Methodologic Challenges and Considerations for the Collection of Dietary Intake Data in Real-world Populations

(P-121) Clinical Notes versus Diagnosis Codes in Identification and Characterization of Women with Endometriosis

(P-130) Prognostic Impact of Three Comorbidity Indices on 1 Year Mortality Among Patients with Hip Fracture

(P-151) Socio-epidemiological Approaches in Designing and Modelling Pharmacy Public Health Programs in Infectious Diseases Control in Developing Countries

(P-182) Can We Really Trust the Findings of the COVID-19 Research? Quality Assessment of the Research Articles Published on COVID-19

(P-183) Can We Really Trust the Findings of the COVID-19 Research? Quality Assessment of the Randomized Controlled Trials Published on COVID-19

(P-194) External Control Arms to Contextualise Single Arm Clinical Trials – Propensity Score Methods Can Be Inconsistent

(P-213) Surveillance of Postmarketing Risk-mitigation Behavior Using Tests of Model Misspecification in a Statistical Process Control Framework

(P-248) Modeling Parasite Clearance Curves in a Cohort to Compare Quinine and Artesunate for the Treatment of Pediatric Cerebral Malaria

(P-257) The Use of Uncertain Exposure – a Method to Define switching and Add-on in Pharmacoepidemiology

(P-260) The Effect of Aspirin on COPD: A Methodological Review of the Observational Studies

(P-270) Real-world Algorithms in Defining Castration Resistant Prostate Cancer in Retrospective Observational Studies

(P-286) Identification of a Diagnostically Complex Condition, Polycystic Ovarian Syndrome, in a Population-based Cohort Using Electronic Health Record Data

(P-316) How COVID-19 Randomized Controlled Trials Reported on Demographic and Clinical Characteristics

(P-317) Experimenting with County-level COVID-19 Data as a Substitute for Demographic Information

(P-339) Methods and Practical Considerations in Use of an External Control to Assess Potential Drug Risk

(P-347) Variation Among Pharmacists in Calculating Days’ Supply

(P-353) Matching Study Design to Prescribing Intention: The Prevalent New User Design in Opioid Research

(P-379) Propensity Score Modeling to Reduce Channeling Bias When Exposure Is Rare

(P-400) Imbalanced Data Bias in Logistic Regression to Estimate Treatment Effects: Results from a Virtual Patient Cohort Simulation

(P-424) Challenges in Studying COVID-19 Treatments in Real-world Hospital Datasets: A Case Study of Tocilizumab

(P-426) Evaluating the Completeness of Electronic Health Records in Identifying Nonfatal Cardiovascular Events in Taiwan

(P-448) Nsaids and Paracetamol-induced Hepatotoxicity: A Systematic Review and Meta-analysis of Observational Studies

(P-451) Creating High Quality External Control Arms from RWD in Support of Regulatory Decision Making

(P-452) Identification of Appropriate Safety Metrics in Long-term Studies

(P-514) Impact of Increasing Enrollment Requirements in Administrative Claims Data

(P-521) Towards OS approximation in early clinical trials using Prognostic Scores

(P-548) Graphical Representation of Multiple Quantitative Bias Analysis Scenarios for Unmeasured Confounding

(P-554) Identification of Patients with Nonalcoholic Steatohepatitis (NASH) in an Electronic Health Record (EHR) Database

(P-555) The Utility of Non-specific ICD-10 Z3A Codes in Estimating Gestational Age

(P-565) Recent Use of External Controls in Clinical Trials: A Pragmatic Literature Review

(P-573) Using Negative Control Outcomes to Assess the Comparability of Treatment Groups Among Postmenopausal Women Switching Osteoporosis Therapy