Section outline

  • Lecture: Selection Bias

    Internal vs. external validity; definition and classification of bias; distinguishing bias from random error; spotting and minimizing selection bias in descriptive, cross-sectional, case-control, and longitudinal (e.g., cohorts or trials) studies

    Faculty:  Jeffrey Martin

    Location:  Mission Hall 1400

    • Prospectus:

    • Announcements Week 6 File

    • Session Slides:

    • Selection Bias 2017 Final Post File

    • Session Audio/Video Recording (Access restricted to registered students):

    • Watch URL
      Not available unless: You belong to a group in Registered Students Only
    • MP4 URL
      Not available unless: You belong to V Avelino-Silva

    • Recommended Reading:

    • S & N:  Ch. 4, sections 4.1 - 4.2 (p. 109 - 116) and sections 4.4 - 4.4.2 (p. 133 - 139)

    • Optional Reading:

    • Hernán MA, Hernández-Díaz S, Robins JM. A structural approach to selection bias. Epidemiology. 15:615-25, 2004. File
      Not available unless: Your ID number contains 02
    • Robinson et al. Systematic review identifies number of stategies important for retaining study participants. J Clin Epi 60:757-765, 2007. File
      Not available unless: Your ID number contains 02
    • Cole et al. Illustrating bias due to conditioning on a collider. International Journal of Epidemiology 39:417-420, 2010. File
      Not available unless: Your ID number contains 02
    • Schwartz S et al. Toward a clarification of the taxonomy of bias in Epidemiology textbooks. Epidemiology 26:216-222, 2015. File
      Not available unless: Your ID number contains 02
    • Howe et al. Selection bias due to loss to follow up in cohort studies. Epidemiology. 27:91-97, 2016 File
      Not available unless: Your ID number contains 02

    • Assignment: Problem Set 6

    • Problem Set 6 Selection Bias 2017 File

    • Assignment Due Date:  October 24, 2017

    • Assignment Answer Key (Access restricted to registered students):

    • Problem Set 6 Selection Bias 2017 Answer Key File