what are the rn variable in mixed effects how to calculate mixed effects model how to measure par1 how is grpval1 measured how does granular therapy work what is the measure for visits on a clinical trial based on baseline where is the grpvar1 variable what is the variable for a visit to the same site why does the v1 variable mean the two visits of each patient how to find the p value of a drug vs a baseline visit what variable is a time for a patient visit to a site how to use a multidimensional mixed-effects model what is the mgv2 variable how to measure a patient visit what is the fv1 0 p drug who would be grouped into two groups in a trial when a site is based on a baseline how long is the visit what is pv1 in pharmacotherapy when to use par variables for therapy which variable is used to describe the number of days that a visit is taken at each of the sites?