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Top Ten terms

  1. cut-off value (cut-off point, cut point, threshold) — 10681 views
    “For diagnostic or screening tests, the value used to divide continuous results into categories; typically positive and negative” … (read more)
  2. performance bias — 9283 views
    “Bias resulting from differences in the care provided to the participants in a study, other than the treatments being compared.” … (read more)
  3. index test — 7892 views
    “A diagnostic test that is being evaluated against a reference standard test in a study of test accuracy” … (read more)
  4. length-time bias (length bias) — 5755 views
    “In screening, an apparent increase in survival due to detecting disease earlier than it would otherwise have been detected” … (read more)
  5. systematic review — 5672 views
    “A summary of studies addressing a clear question, using systematic and explicit methods to identify, select, and critically appraise relevant studies, and to collect and analyse data from them” … (read more)
  6. effect estimate (effect size, estimate of effect, point estimate) — 4824 views
    “A statistical measure indicating the most likely size of a treatment effect” … (read more)
  7. allocation bias (assignment bias, selection bias) — 4433 views
    “Bias resulting from the way participants in a study have been allocated to treatment comparison groups.” … (read more)
  8. randomized study (randomized control trial, RCT, randomized trial, randomized controlled trial (should not be used)) — 4211 views
    “A category of studies comparing two or more treatments in which random allocation is used to assign participants to treatment comparison groups” … (read more)
  9. before-after study (before and after study, uncontrolled before and after study, uncontrolled before-after study) — 3870 views
    “A type of non-randomized study in which health conditions are measured before and after a treatment” … (read more)
  10. play of chance (random error) — 3834 views
    “In treatment comparisons, a type of error that may affect the results because too few events or outcomes have been observed to provide a reliable measure of the treatment effects” … (read more)