Hi sir/madam,
Hope you are Healthy and doing well,
In my study I have 2 experimental groups (patients with neck pain and sleep disturbances at baseline) these two groups are equal at baseline in almost all variables and one control group (healthy participants).
After 6 weeks of interventions I have taken the post readings.
Is 2 way repeated measure ANOVA suitable test to use ? Or other test could be more accurate?
If 2 way repeated measure is suitable, should I incorporate covariate in the analysis or keep it blank ?
Thank you
important question. Why Two way? I think you only have one independent variable.
I think it is more appropriate to use analysis of covariance. One-way ANCOVA
I have 10 variables, i tested each on at 2 point, before and after intervention. Could you let me know why it is a better option to use One-way ANCOVA?
Hello,
If you have measured the outcome of interest two times. Then first you need to clarify the category of measurement and normality distribution for your data. After that, you can decide on the test. And moreover, ANOVA is used for comparing then two measurements (But still, you can go for factor analysis).
Thank You
Hi Mosab,
I hope you are doing well.
In this case, where you have got 3 groups and 2 time points of measurement, you should go for 3X2 repeated measured ANOVA. ANOVA will be applicable subject to type of data (only if the data is continous, you can go ahead with ANOVA) and normality of the data (log transform the if non-normal). These are basic assumptions to any parametric test.
Regarding including the covariates, you need not to add any co-variate if you have not proposed any co-variate adjusted analysis. If in case, any variable comes out to be significantly different between the groups at baseline, then, you can go for analysis of covariance (ANCOVA) where in you can put the baseline value as a covariate.
Thanks & regards,
Dr. Pooja
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