When referring to 'signs' in a medical setting, what type of evidence is being discussed?

In a medical setting, 'signs' refer to objective evidence that can be seen or measured by a healthcare professional. These are observable phenomena such as a rash, swelling, fever, or abnormal lab results that can be quantified or assessed without relying on the patient's subjective experience. Signs are crucial for diagnosing conditions and are typically supported by physical examinations or diagnostic tests.

In contrast to qualitative data based on feelings, which focuses more on personal perceptions and experiences, signs are grounded in objective reality. They differ from historical symptoms reported by patients, as those are subjective experiences that might vary from person to person. Similarly, conjectures made during patient interviews are based on assumptions and interpretations rather than concrete evidence. Therefore, recognizing and interpreting signs is essential in clinical practice for accurate assessment and treatment planning.