I use SPSS.

thank you very much

example

followup t0 t1 t2 t3

.

person1: 2 4 4 5

person2: 1 3 2 5

person3: 0 0 1 1

....

p.s. I could also perform this statistic using a three year database, so the groups of data will be much more

- Thread starter Rerun
- Start date

I use SPSS.

thank you very much

example

followup t0 t1 t2 t3

.

person1: 2 4 4 5

person2: 1 3 2 5

person3: 0 0 1 1

....

p.s. I could also perform this statistic using a three year database, so the groups of data will be much more

I can compare the cohort of person undergoing the threatment with another cohort undergoing a different one. basically the dataset is huge and some of them chose a treatment, some another, the rest went for placebo. For all of them the initial conditions were the same and there was a three months follow-up.

I need a test that makes me answer the question: which treatment is the best?

thank you so much

Could you describe your dependent variable in more detail? Maybe it could

be treated as an interval scaled measure.

How large are your 3 samples? And is it correct to assume that no randomization

was used to allocate subjects to groups?

With kind regards

K.

Last edited:

the dependent variable is a score that is related to an effect. it goes from 0 to 9

Was it already used and validated in other studies? How was it treated there, always as

ordinal scaled?

unfortunately no randomization has been done

with time of measurement as within-subjects factor and group

as between subjects factor. But this assumes an interval scaled

dependent variable.

With kind regards

K.