Medical research relies on clinical trials to assess therapeutic benefits. Because of the effort and cost involved in these studies, investigators frequently use analyses of subgroups of study ...
Subgroup analysis is often observed in the medical literature 1,2 but most surgeons are notoriously unaware of what it means or how to use it. Subgroup analysis is often done without second thought, ...
The values of the subgroup-variable, which is specified in the chart statement, indicate how the observations in the input data set (a DATA=, HISTORY=, or TABLE= data set) are arranged into rational ...
The identification of subgroups of patients from randomized clinical trials that are of specific interest for guiding clinical decisions can be an attractive idea; however, since such trials are ...
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