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Table 1 Examples of likely relevant theories, the variables within the theories, and questionnaire items for the behaviour of managing patients with borderline haemoglobin by watching and waiting instead of transfusing red cells.

From: Using theories of behaviour to understand transfusion prescribing in three clinical contexts in two countries: Development work for an implementation trial

Theory Predictor Variables Illustrative items
Theory of Planned Behaviour [22] Attitude
Subjective norm (perceived pressure)
Perceived behavioural control; Intention
In general, the benefits of managing patients with borderline haemoglobin by watching and waiting instead of transfusing red cells outweigh the harms. (Attitude)
Social Cognitive Theory [23] Self-efficacy
Goals relevant to watching and waiting
I am confident that I can manage a patient with borderline haemoglobin by watching and waiting instead of transfusing red cells. (Self-efficacy)
Implementation Intention [36] Action plan I have a clear plan of how I will manage patients with borderline haemoglobin by watching and waiting instead of transfusing red cells.