How To Prep For Cstr Exam. Taking a small portion of a larger set of data to study in order to obtain a picture of the probable larger total population (can save time and money) frequency. The w score represents the difference between the number of patients actually surviving and the number of survivors expected per 100 patients treated.

The w score represents the difference between the number of patients actually surviving and the number of survivors expected per 100 patients treated. The american trauma society has developed multiple cstr exam study tools to assist exam candidates in preparation for the cstr exam. Please see a full list of cstr exam study tools below: