equivalence

  1. N

    Measuring equivalence/reliability (ICC and consorts)

    For a reliability study I’m administering patient reported outcomes (questionnaires) with 2 modes of administration (on paper and via an electronic device). I’d like to measure equivalence/reliability of the 2 modes of administration. In other words: does the electronic version of the...
  2. D

    How to show statistical equivalence between groups of data?

    I'm trying to determine if these two groups of data are equivalent. How do I show that mathematically? I have conducted an experiment in which three samples were each measured at two time points as shown in the image. I would like to compare these data and demonstrate (with some sort of...
  3. drtoddchang

    Similarity instead of differences in means b/w 2 groups

    Hi - long time lurker. First time poster. I'm hoping folks can provide guidance and opinions. I am looking at a small pilot study (n=16) of subjects whose heart rates are being measured as part of stress physiology. Heart rate is the continuous outcome variable (/min). The subjects go...
  4. M

    Sample size in equivalence trial?

    Hey all, For my thesis I need to calculate the sample size for an equivalence trial with four groups (the score on four equivalent forms in order to prove they are indeed equivalent). The study is done before with only one of the four forms, they found a mean = 19.8, SD = 2.0, tolerance =...
  5. T

    Fisher's exact test and non-inferiority / equivalence

    I have some data (multiple choice question scores for two groups of medical students exposed to an experimental and standard type of anatomy teaching). It's ordinal data (scores out of 10). I'd like to test whether the experimental type of teaching is equivalent (i.e. not inferior) to the...