RESEARCH QUESTIONS: What is the clinical evidence on the use of T-score compared to Z-score as a measurement to assess the 10-year fracture risk in patients under 50 years old who are on steroid therapy? [...] KEY MESSAGE: There is no evidence found on the use of T-score compared to Z-score as a measurement to assess the 10-year fracture risk in patients under 50 years old who are on steroid therapy. [...] The intent is to provide a list of sources and a summary of the best evidence on the topic that CADTH could identify using all reasonable efforts within the time allowed. [...] Selection Criteria and Methods One reviewer screened the titles and abstracts of the retrieved publications and examined full- text articles for the final article selection, according to the selection criteria outlined in Table 1. Table 1: Selection Criteria Population Patients under 50 years old who are on steroid therapy Intervention T- score Comparator Z-score Outcomes 10-year fracture risk Stu [...] Summary of Study Characteristics Given the lack of evidence on the research topic, a summary of study characteristics is not applicable.