{"id":12570,"date":"2018-04-07T04:24:54","date_gmt":"2018-04-07T04:24:54","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=12570"},"modified":"2021-05-09T13:16:20","modified_gmt":"2021-05-09T07:46:20","slug":"sas-repeated-measure-analysis","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/sas-repeated-measure-analysis\/","title":{"rendered":"SAS Repeated Measure Analysis – PROC GLM Procedure"},"content":{"rendered":"

We looked at t-tests<\/strong>, correlation<\/strong>, regression<\/strong>, Bland-Altman analysis<\/strong>, and\u00a0chi-square test<\/strong>\u00a0in the previous SAS tutorials, today we will look at another important process called SAS Repeated Measure Analysis and\u00a0SAS Proc\u00a0GLM Procedure.<\/p>\n

At last, we\u00a0will see\u00a0how Repeated measure analysis can perform in SAS Programming Language<\/strong>.<\/p>\n

So, let’s start with SAS Repeated Measure Analysis.<\/p>\n

What is SAS Repeated Measure Analysis<\/h2>\n

Repeated measures data comes from experiments where you take observations repeatedly over time. Under\u00a0SAS repeated measures analysis (experiment), experimental units observe at multiple points in time.<\/p>\n

So, instead of looking at an observation at one point in time, we will look at data from more than one point in time. With this type of data we are looking at only a single response variable<\/strong> but measured over time.<\/p>\n

SAS Repeated Measure Analysis can use in the univariate as well as a multivariate setting.<\/p>\n

The PROC GLM Procedure<\/h2>\n

In SAS\u00a0PROC GLM\u00a0use to carry out repeated measure analysis.<\/p>\n

A Syntax of PROC GLAM Procedure-<\/strong><\/p>\n

PROC GLM DATA=dataset;\r\n\u00a0 CLASS variable;\r\n\u00a0 MODEL variables = group \/ NOUNI ;\r\n\u00a0 REPEATED TRIAL n;<\/pre>\n
Here Model tells the model to be fit using certain variables form the dataset<\/strong>. REPEATED\u00a0tells the number of repeated measures we wish to perform for each group to test the hypothesis<\/strong>.<\/p>\n
Applying Repeated Measure Analysis in SAS<\/h2>\n
Consider the example below in which we have two groups of people subjected to test their shopping preference. The reaction time of each person is recorded for each of the three shopping preferences tested.<\/p>\n
Here 5 trials are done for each group of people to see the strength of correlation between the effect of the three shopping preferences.<\/p>\n
Example of SAS Repeated Measure Analysis-<\/strong><\/p>\n
DATA XYZ;\r\n\u00a0 INPUT EMPLOYEE group $ a1 a2 a3 ;\r\nCARDS;\r\n1   B\u00a0   3\u00a0   1\u00a0   60\r\n2   B\u00a0   6\u00a0   4\u00a0   23\r\n3   B\u00a0   2    14   34\r\n4   B\u00a0   1\u00a0   4\u00a0   40\r\n5   B\u00a0   0\u00a0   5\u00a0   45\r\n6   A\u00a0   41   1    56\r\n7   A\u00a0   22   4    89\r\n8   A\u00a0   45   9    23\u00a0\r\n9   A\u00a0   60\u00a0  8    22\u00a0\r\n10  A    5\u00a0   7    10\u00a0\r\n;\r\nRUN;\r\n\u00a0PROC PRINT DATA=XYZ ;\r\nRUN;\r\n\u00a0\u00a0PROC GLM DATA=XYZ;\r\n\u00a0 CLASS group;\r\n\u00a0 MODEL a1-a3 = group \/ NOUNI ;\r\n\u00a0 REPEATED trial 5;\r\nRUN;<\/pre>\n
Here we use the\u00a0NOUNI<\/em>\u00a0option with a multivariate or SAS repeated measures analysis of variance when you do not need the standard univariate output.<\/p>\n
\"SAS<\/a>
Example- SAS Repeated Measure Analysis & PROC GLM Procedure<\/p><\/div>\n
 <\/p>\n
\"SAS<\/a>
Output -1 SAS Repeated Measure Analysis & PROC GLM Procedure<\/p><\/div>\n
 <\/p>\n
\"SAS<\/a><\/p>\n
This was all about SAS Repeated Measure Analysis Tutorial. Hope you like our explanation of SAS PROC GLAM Procedure.<\/p>\n
Conclusion<\/h2>\n
Hence, we hope you all understood what is SAS repeated measure analysis and SAS PROC GLAM Procedure. In conclusion, we saw how can we create repeated measure analysis in SAS Programming Language.<\/p>\n
Furthermore, if you have any query feel free to ask in a comment section and stay tuned to learn more interesting things in SAS.<\/p>\n","protected":false},"excerpt":{"rendered":"
We looked at t-tests, correlation, regression, Bland-Altman analysis, and\u00a0chi-square test\u00a0in the previous SAS tutorials, today we will look at another important process called SAS Repeated Measure Analysis and\u00a0SAS Proc\u00a0GLM Procedure. At last, we\u00a0will see\u00a0how...<\/p>\n","protected":false},"author":6,"featured_media":12575,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[10024,10029,11537,12231,14064],"class_list":["post-12570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sas","tag-proc-glam-syntax","tag-proc-glm-procedure","tag-repeated-measure-analysis-in-sas","tag-sas-repeated-measure-analysis","tag-syntax-of-proc-glam-procedure"],"yoast_head":"\nSAS Repeated Measure Analysis - PROC GLM Procedure - DataFlair<\/title>\n<meta name=\"description\" content=\"SAS Repeated Measure Analysis tutorial- SAS PROC GLAM Procedure, how can we create repeated measure analysis in SAS, example & Syntax of PROC GLAM Procedure\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/sas-repeated-measure-analysis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SAS Repeated Measure Analysis - 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