Assessing the impact of institution-specific guidelines for antimicrobials on doctors’ prescribing behavior at a German tertiary-care center and the additional benefits of providing a mobile application

Sebastian G Schönherr, Sebastian Wendt, Donald Ranft, Bettina Schock and Christoph Lübbert

PLOS ONE, 2020, vol. 15, issue 11, 1-12

Abstract: Objective: To assess usage patterns, perceived usability, and effects of institution-specific guidelines (ISGs) for antimicrobials on clinicians’ prescribing behavior and the additional benefits of the mobile application (app), a single-center survey among medical doctors was performed. Methods: The study was carried out in a 1451-bed tertiary-care academic medical center in Leipzig, Germany. To ensure optimal empirical antibiotic therapies, appropriate diagnostics, and targeted antimicrobial prophylaxis, ISGs were provided as printed pocket guides (since 2014), a PDF version on ward computers, and a mobile app (since 2017). For the survey, we used an electronically structured cross-sectional questionnaire with 31 items, ordinal Likert scales, and percent bars, allowing for quantitative comparisons. Results: Of the 914 doctors contacted by email, 282 (31%) responded, and 254 (28%) surveys were eligible. ISGs were reported to be the most commonly used source of information for antimicrobial prescribing among the respondents. Ninety-four percent used ISGs at least once and 55% at least weekly. On average, participants reported using them in 38% of antibiotic prescriptions and to adhere to consulted recommendations in 87% of cases. Young clinicians (≤ 30 years) reported significantly higher use of the ISGs than their older colleagues (47% vs. 35% of antibiotic prescriptions, p = 0.004). Ninety-six percent of users found ISGs to be user-friendly, and nearly 100% recommended ISGs to other colleagues. Forty-five percent regarded the app as the most user-friendly way to access ISGs, and app users were significantly more likely to use ISGs regularly (p = 0.024). Eighty-four percent reported behavioral changes regarding at least one aspect of antimicrobial therapy (e.g. duration, application mode, prescription frequency), while 54% reported changes regarding the choice of specific substance groups. Conclusions: ISGs are used regularly and appear to have a relevant impact on clinicians’ prescribing habits. A mobile app may be the most effective way to provide ISGs, although multiple platforms seem to add value. While the majority of participants reported perceived effects on their prescribing behavior, this study does not allow any conclusions to be drawn about the extent of the effects of ISGs on antibiotic use and patient outcomes.

Date: 2020
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DOI: 10.1371/journal.pone.0241642

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