search for: qustionnaires

...be analyzed using the last observation carried forward method. In other words, in order to comply with intent to treat analysis when many subjects withdraw, data points for the last visit must be generated and filled in with the last observation. The ultimate goal is to tabulate the difference in qustionnaires between the start of the trial and the end of trial. I am lost at about how to do this. Each subject had multiple visits, up to 13. In general, they took a questionnaire at each visit. However, if a questionnaire was not completed or the visit is missing, the data point does not exist. To exp...