+ Reply to Thread
Results 1 to 2 of 2

Thread: McNemar's test post-hoc power analysis problem when odds ratio=0

  1. #1
    Points: 117, Level: 2
    Level completed: 34%, Points required for next Level: 33

    Posts
    2
    Thanks
    1
    Thanked 0 Times in 0 Posts

    McNemar's test post-hoc power analysis problem when odds ratio=0




    I need to do post-hoc power analysis for a McNemar's test (using G*power), and am having trouble getting results. One of the discordant pairs is 0, therefore the odds ratio is zero, and it seems that power cannot be calculated using an odds ratio of 0. Is there any way around this?

    Nevermind responding with suggestions to not do post-hoc analysis - I realize there are arguements against it - I have been instructed to do this.

    Thank you for your time!

  2. #2
    Omega Contributor
    Points: 38,334, Level: 100
    Level completed: 0%, Points required for next Level: 0
    hlsmith's Avatar
    Location
    Not Ames, IA
    Posts
    6,998
    Thanks
    398
    Thanked 1,186 Times in 1,147 Posts

    Re: McNemar's test post-hoc power analysis problem when odds ratio=0


    Sometimes a continuity correction of 0.5 can be added to all cell counts. This can be used to get the proxy calculation.
    Stop cowardice, ban guns!

  3. The Following User Says Thank You to hlsmith For This Useful Post:

    elmorem (02-04-2015)

+ Reply to Thread

           




Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts






Advertise on Talk Stats