https://communities.sas.com/t5/Statistical-Procedures/Replicating-observation-and-compiling-mean/m-p/53761#M2501 Hi-<BR /> <BR /> There's a longitudinal data set I'm working with which I need to compare baseline weight to mean weight of patients from third week of study to end of study/time of censoring. <BR /> <BR /> Each patient has different number of record for weight in the dataset (i.e. patientgp will be the groping variable.) <BR /> <BR /> I thought about creating a variable "baselinewt" and replicating baseline weight within each patient (by "patientgp") so that I can compare mean weight of each patient to "baselinewt" after removing first two weeks. To do this, I would appreciate help replicating observations and compling mean within a group. <BR /> <BR /> If there's easier way to solve this problem, I would welcome that as well. Thanks. Wed, 20 Apr 2011 14:51:16 GMT infinity255 2011-04-20T14:51:16Z https://communities.sas.com/t5/Statistical-Procedures/Replicating-observation-and-compiling-mean/m-p/53761#M2501 Hi-<BR /> <BR /> There's a longitudinal data set I'm working with which I need to compare baseline weight to mean weight of patients from third week of study to end of study/time of censoring. <BR /> <BR /> Each patient has different number of record for weight in the dataset (i.e. patientgp will be the groping variable.) <BR /> <BR /> I thought about creating a variable "baselinewt" and replicating baseline weight within each patient (by "patientgp") so that I can compare mean weight of each patient to "baselinewt" after removing first two weeks. To do this, I would appreciate help replicating observations and compling mean within a group. <BR /> <BR /> If there's easier way to solve this problem, I would welcome that as well. Thanks. Wed, 20 Apr 2011 14:51:16 GMT https://communities.sas.com/t5/Statistical-Procedures/Replicating-observation-and-compiling-mean/m-p/53761#M2501 infinity255 2011-04-20T14:51:16Z