Table 1.

Coding assumptions for identifying behaviour change techniques [17] in intervention descriptions

Coding assumption	Behaviour change technique	BCT definition (contained in the Supplemental Materials)
Changes to hospital policies were coded as Instruction on how to perform the behaviour whether it was clear or not that HCPs were instructed on the new policy	Instruction on how to perform the behaviour	Advise or agree on how to perform the behaviour
If distribution of guidelines related to the behaviour were part of, or occurred during, the intervention both Instruction on how to perform the behaviour (see above) and Information about health consequences were coded.	Information about health consequences	Provide information (e.g. written, verbal, visual) about health consequences of performing the behaviour
Removal of drugs from a pharmacy list was coded as Restructuring physical environment despite the physical location of the drug removal was away from the HCP performing the behaviour. There was no BCT to reflect the removal of object similar to the BCT for Adding object to the environment.	Restructuring physical environment	Change or advise to change the physical environment in order to facilitate the performance of a wanted behaviour or create barriers to the unwanted behaviours (other than prompts/cues, rewards and punishments)
Interventions in which HCPs were required to discuss care with other colleagues or obtain signing authority for a test or treatment were coded as both Social support (practical) and Restructuring social environment.	Social support (practical) and Restructuring social Envirunment	Advise or arrange or provide practical help (e.g. from friends, relatives, colleagues, buddies or staff for performance of behaviour) and Change, or advise to change the social environment in order to facilitate performance of watned behaviour or create barriers to the unwanted behaviour (other than prompts/cues, rewards and punishment)
Any changes to electronic medical records (EMRs) were coded as Restructuring physical environment (see above). However, if forms were added to the EMR, that was coded as Adding objects to the environment.	Adding objects to the environment	Add object to the environment in order to facilitate the performance of the wanted behaviour