RE: "I'm wondering if now the investigator took the parent report under consideration. In b it states "No data on actual smartphone usage was collected in this study". Now in d are we using parent report rather than the instrument?"
***I'm not sure what you mean by "Are we using...?" We did not do the study, so it is not up to us whether to use parent report. We can only do our best to interpret the study as reported.
RE: And another question that came up was 10e. Is this asking where the 25% came from or why 0.25 is not the propensity score?
***It is asking why 0.25 is not the mean propensity score in the current users.