Determinants of in-hospital antibiotic prescription behaviour: a systematic review and formation of a comprehensive framework

Background: Knowledge of determinants that influence antibiotic prescription behaviour (APB) is essential for the successful implementation of antimicrobial stewardship interventions. The theory of planned behaviour (TPB) is an established model that describes how cognitions drive human behaviour. Objectives: The objective of this study was to identify the sociocultural and behavioural determinants that affect APB and to construct a TPB framework of behavioural intent. Methods: The following online databases were searched: PubMed, Medline, Embase, Web of Science, Cochrane Library and Central. Studies published between July 2010 and July 2017 in European countries, the United States, Canada, New Zealand or Australia were included if they identified one or more determinants of physicians' APB. A systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Based on the TPB, determinants were categorized in behavioural, normative and control beliefs, thus shaping a conceptual framework for APB. Results: Nine studies were eligible for inclusion, and 16 determinants were identified. Determinants relating to fear of adverse outcome (5/9), tolerance of risk and uncertainty (5/9), hierarchy (6/9), and determinants concerning normative beliefs—particularly social team dynamics (6/9)—were most frequently reported. Beliefs about antimicrobial resistance and potential negative consequences of antibiotic use were rarely mentioned. Conclusions: Behavioural, normative and control beliefs are all relevant in APB. There is a need for quantitative studies to assess the weight of the individual determinants to be able to efficiently design and implement future stewardship interventions. The constructed framework enables a comprehensive approach towards understanding and altering APB.