What are they?

The evaluation of diagnostic test accuracy involves determining how well a test can correctly identify individuals with or without a specific condition. Systematic reviews of diagnostic test accuracy (DTA) summarize the evidence about test accuracy. Furthermore, they should provide a context for the evidence and explain why the results may vary across studies, compare alternative tests, and help the reader to formulate clinical conclusions based on the evidence. Consequently, diagnostic test accuracy reviews play a significant role in shaping clinical practice guidelines.