Compositional and reusable grouping of clinical statement attributes that make up the clinical focus of the statement. StatementTopic class attributes are aligned with SNOMED CT Concept Model attributes when such an overlap exists. Note that this class does not include contextual attributes such as the nature of the action (ordered, proposed, planned, etc...), the nature of the patient state being described (e.g., present, suspected present, absent), and the attribution of this information (the who, when, where, how, why of the information recorded).
The concept representing the finding or action that is the topic of the statement. For actions, the key represents the action being described. For findings, the key represents the "question" or property being investigated. For evaluation result findings, the key contains a concept for an observable entity, such as systolic blood pressure. For assertion findings (which by nature lack an explicit question), the key contains a default concept signifying that an assertion is being made. In all cases, the key describes the topic independent of the context of the action or the finding.