Biostatistics and epidemiology are core components of the medical curriculum because a clear understanding of these subjects is required to critically review research and the medical literature. Concepts from these subjects are tested in all three steps of the written USMLE exam and are found in residency in-service and board exams for numerous, if not all, medical specialties.

Key Features

  • Distills the most important details into a format that is interactive and can be reviewed in a short time
  • Provides for thorough understanding of how these subjects are tested
  • Basic and advanced concepts are presented to teach students how to apply this knowledge in exam scenarios
  • Fast and effective way to learn

Why Should I Subscribe?

Simply reading about biostatistics and epidemiology does little to prepare you to apply that information practically in a standardized testing environment. UWorld's subject matter and questions are developed, edited, and constantly updated by physicians and specialists who have taken the tests and mastered the knowledge base. The biostatistics and epidemiology subject review presents basic and advanced concepts in a simple way for more efficient learning.

  • Subject -> Chapter -> Topic level tree navigation for quick and easy review
  • Multiple sets of questions for each topic in each chapter
  • Detailed explanation for each topic
  • Significantly different sets of questions (compared to Qbank) based on the most realistic exam content
  • Substitutes subject review books with online interactive quiz approach
  • Includes the most relevant exam material to help students prepare efficiently


I started out using another question bank in addition to UWorld but quickly abandoned it when it became apparent that UWorld was vastly superior, particularly in terms of vignette content and topics covered. Now that I have finished the exam, I am glad I made that decision. The topics and question style in UWorld mirrored the content of my exam very closely, and the questions' clear, detailed explanations helped immensely.

- Alex

I would like to share my joy about my score report in Step 2 CK. I got a 264/99 in my exam and it took a lot of hard work, but I couldn't have done it without UWorld. Clearly, if there is one advice I can give to someone preparing for USMLE Step 2, it would be prepare with UWorld. Congrats for your high quality work, your professionalism and your passion for detail and creating high level medical thougth for future doctors.

- Poly


UWorld has designed the subject review series to present important core concepts in a novel fashion that pairs concise, high-yield explanations with test-style multiple-choice questions to ensure complete understanding of the study material. Unlike texts, review books, and other available resources, the subject review distills the most important details into an interactive format that can be reviewed quickly.

We use cookies to learn how you use our website and to ensure that you have the best possible experience.
By continuing to use our website, you are accepting the use of cookies. Learn more
   I accept