Greetings Community, I would like help with the following issue: is there a way to create arrays when working with datasets in long format? I usually work with a wide dataset with the following configuration: data wide; input id time1 time2 time3 group1 group2 group3 outcome1 outcome2 outcome3; cards; 1 20 30 40 0 1 0 0 1 0 2 10 15 20 0 0 1 0 0 0 ; On this dataset, I perform time-dependent survival analysis and I am able to censor cases which had developed in previous time periods (i.e., in time period 3, subject 1 would be excluded since he developed the outcome in time period 2). I manage to do this with arrays. Now, I am working with an Access-derived dataset, which is formatted in long fashion like this: data long; input id visit time group outcome; cards; 1 1 20 0 0 1 2 30 1 1 1 3 40 0 0 2 1 10 0 0 2 2 15 0 0 2 3 20 1 0 ; How would you group the set of outcomes from the same patient, in example to exclude the third observation (and any other after an outcome has occurres, for instance)? Many thanks, Manuel
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