Dear All,
I would be grateful for your advice concerning the following.
I am working on an outcome analysis (with outcome data-CBCL scores-
available at intake and end of treatment) regarding a parenting program.
It has been impossible to obtain data from parents who dropped out (around
25 %). Moreover, another 15% have not provided data at either intake or
follow-up, although they completed the intervention.
I had previously based the outcome analysis on only those who had data
available at both intake and completion. However, the Editor has asked me
to present an intention to treat analysis (ITTA).
My questions
1. Should I include all cases for this analysis? (regardless of whether
they completed the treatment, and whether they provided data at both
intake and the second time point?)
2. When performing an ITTA with missing data, which is the best way to
impute the missing data (CBCL scores)? The average? Or?
Any guidance/reading suggestions would be hugely appreciated
Many thanks and happy New Year
Ioanna
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