What I can propose is rather simple, so it may well be completely wrong
(especially as no true expert has posted anything on the topic so far), but
perhaps it will be of some use:
why not pool data for an individual over time-periods - say, months, or to
preserve more information, weeks? (Perhaps not by averaging, but - depending
on data chracteristics - using median, geometric mean, or some fancy
M-estimator?)
- This will give you the possibility to conduct an ANOVA-type analysis -
mixed model with some "nonrepeated" factors (three fixed, if I get it right,
i.e., treat/control, sex and age, plus eventual others) and week (or
whatever time-period) as "repeated".
As emphasised in the introduction, this may be less than two cents.
Best regards,
Gaj Vidmar
Univ. of Ljubljana, Dept. of Psychology
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