• 1. Rovel T, Audigié F, Coudry V, et al. Evaluation of standing low-field magnetic resonance imaging for diagnosis of advanced distal interphalangeal primary degenerative joint disease in horses: 12 cases (2010–2014). J Am Vet Med Assoc 2019;254:257265.

    • Search Google Scholar
    • Export Citation
  • 1. Mattson K. Homeward bound. J Am Vet Med Assoc 2019;254:450457.

  • 1. Stiver SL, Fisher KR, Tobias JR, et al. Pathology in Practice. J Am Vet Med Assoc 2019;254:599601.

  • 1. Stiver SL, Fisher KR, Tobias JR, et al. Pathology in Practice. J Am Vet Med Assoc 2019;254:599601.

  • 1. National Council on Teaching and America's Future (NCTAF). What matters most: teaching for America's future. 2012. Available at: nctaf.org/wp-content/uploads/2012/01/WhatMattersMost.pdf. Accessed Jan 2, 2019.

    • Search Google Scholar
    • Export Citation
  • 2. Hecker K, Violato C. How much do differences in medical schools influence student performance? A longitudinal study employing hierarchical linear modeling. Teach Learn Med 2008;20:104113.

    • Search Google Scholar
    • Export Citation
  • 3. AVMA. COE accreditation policies and procedures: requirements. Available at: www.avma.org/ProfessionalDevelopment/Education/Accreditation/Colleges/Pages/coe-pp-requirements-of-accredited-college.aspx. Accessed Jan 2, 2019.

    • Search Google Scholar
    • Export Citation

Advertisement

Letters to the Editor

Questions on statistical methods

Regarding the report by Rovel et al1 titled “Evaluation of standing low-field magnetic resonance imaging for diagnosis of advanced distal interphalangeal primary degenerative joint disease in horses: 12 cases (2010–2014),” I was disappointed to see what I believe to be clear critical flaws in the statistical methods. First, t tests were performed on data that were not collected from a random sample. Second, ordinal grade data were treated as continuous measurements.

Specifically, t tests should be reserved for data collected from random samples, whereas this study was a case series,