Using data set CLINICAL from Problem 4.4, create a new SAS data set (CI-IANGE) with one observation per subject with the difference in WEIGHT between the first and last visit. Include in this data set...

Using data set CLINICAL from Problem 4.4, create a new SAS data set (CI-IANGE) with one observation per subject with the difference in WEIGHT between the first and last visit. Include in this data set the number of days between the first and last visit. Do not include any patients who have only one visit.

Problem 4.4

Run the following program to create a SAS data set called CLIN1CAL. Using this data set. compute the difference in weight from one visit to the next.