how to measure treatment effect what is the test for regression analysis how to do regression analysis with a t-test when to use wilcoxon how to find trend in longitudinal data who are control subjects what is the best way to measure the impact of a treatment what is the plan of action to determine how the trend of a metric relates to the data? how to find a trend for a treatment metric how to compare treatment to control why use a trend in longitudinal data when to match test subjects to control how do you tell if a test relates to a randomized trial what is the best way to measure a period of time how to find the trend of treatment period when do you detrend regression when is a wilcoxon test used to identify a trend of a study how can i find the trend of my data what are the criteria for predicting an effect of treatment? how to determine the effect of treatment on a npi