Table 1.

Elements of implementation fidelity for FCM administration adapted from Carroll et al. elements and modified by Hasson Henna

Elements and sub-elements of implementation fidelity	Definition	Method/measurement for Implementation fidelity
1. Adherence	The degree to which FCM is delivered as intended	Quantitative
Content	The necessary steps (active ingredients) in administering FCM	Number of FCM administration with complete adherence to the active ingredient of FCM administration (the essential (n = 10) components) / total number of FCM administration observed (n = 254)
Coverage	The proportion of eligible participants who actually received FCM administration	Total number of FCM administration observed/ Number of participants eligible for FCM administration
Dose	Amount of FCM administered as intended	Number of FCM administrations that adhered to the right amount (20 mg/kg) / total number of FCM observed
Duration	Regularity of the time to monitor for adverse events post-FCM administration	Number of FCM administered that adhered to the right duration of time (30 min) for monitoring post-administration / total number of FCM observed
2. Influencers of fidelity	Factors that influence the degree of implementation fidelity	Qualitative
Intervention complexities	The comprehensiveness of FCM description and the complexity associated with its administration	In-depth interviews (IDI)
Facilitation strategies	Strategies provided to optimise and standardise implementation fidelity,
Quality of delivery	The degree to which FCM is delivered in a way appropriate to achieving its desired outcome
Participant’s responsiveness	The acceptance and engagement of the SHP to FCM administration
Context	Structural, cultural, organisational / group factors that influence FCM administration

SHP Skilled health personnel, FCM ferric carboxymaltose