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  1. PB_1989

    Paired ratio significance test -- is Chi-squared test correct? :|

    Dear Community, Thanks very much for picking up this thread. I’m having some trouble finding the right statistical test for paired ratios (n = 10,000 patients), having not been able to do my usual thing of googling my way to certainty. I have data in the following layout: The data are...
  2. PB_1989

    Sample size too big for Wilcoxon Signed Rank test in R — what to do?

    Dear Community, We are trying to perform a Wilcoxon Signed Rank Test in R but suspect it is not working because our dataset is too large. We have around 10,000 paired samples: looking at number of hospital appointments before and after an intervention. About half of the population have a...
  3. PB_1989

    Desperate for help => Poisson regression or simple non-parametric test?

    Thanks a lot, Dason. I currently only have data that describes the profile (low, medium or high user) of the patient. As far as I know, getting raw login counts may be possible but highly unlikely in time for our deadline next week :(, so trying to work with what I have (which I concede could be...
  4. PB_1989

    Desperate for help => Poisson regression or simple non-parametric test?

    Oh sorry! I should have qualified my use of such a pleading tagline. We are submitting a business case next week to try and get more funding to continue rolling out the app for more patients. As a team of non statisticians, we have googled and read around how to put our hypothesis to the test...
  5. PB_1989

    Desperate for help => Poisson regression or simple non-parametric test?

    Thank you very much, @hlsmith! This analysis is retrospective i.e. we are looking at data from August 2018 - July 2019 (1 year snapshot). The healthcare provider I work for runs three similar hospitals (hospital A, B and C), serving similar populations in the same state. Patients were enrolled...
  6. PB_1989

    Desperate for help => Poisson regression or simple non-parametric test?

    Dear Community, Hopefully, an easy question to answer! Thanks for picking up this thread. I'm doing an evaluation on whether the use of a digital health tool (MyHealth app) changes the utilisation of healthcare services and am stumped on how to do the analysis. We have 4 groups, based on usage...