• Rachel Barry, Colm O Tuathaigh, and Robert Cunney.
• Department of Clinical Microbiology, Children's Health Ireland at Temple Street Children's University Hospital, Dublin 1, Ireland. rachelbarry91@gmail.com.
• Ir J Med Sci. 2025 Jan 31.

BackgroundLab users should display an understanding of microbiology tests and avoid inappropriate requests which may yield negative clinical consequences. Our research addressed diagnostic stewardship education and the perspectives of paediatric hospital doctors on their (1) self-perceived knowledge, (2) motivators for test ordering, (3) proposed educational interventions and (4) preferred teaching modalities.MethodsAn anonymous, mixed-methods, 34-item online questionnaire was distributed to paediatric doctors across three Irish hospital sites from March to May 2023. Descriptive statistics summarised Likert-scale responses and inductive thematic analysis was used to analyse open-ended items. Subgroup analyses examined differences between consultants and non-consultant hospital doctors (NCHDs).ResultsThe analysis included 100 respondents (n = 45 consultants, n = 55 NCHDs, 24% response rate). Consultants scored higher than NCHDs in self-perceived knowledge (p < 0.001). Patient comorbidity, clinical status, local guidelines and accuracy of microbiological tests were the strongest motivators for test-ordering. Consultants were more likely to be influenced by accuracy (p = 0.03), costs (p = 0.01) and laboratory workload (p = 0.01). Only 27% reported formal teaching on diagnostic stewardship. NCHDs demonstrated increased willingness to engage in educational interventions (p = 0.024), and a comparatively higher interest in in-person teaching (p = 0.002) and gamification (p = 0.02). Respondents indicated a preference for formal guidelines on microbiology testing, in-person teaching, cost familiarisation and e-learning modules. Novel methods (peer-to-peer programmes, simulation and gamification) were less favoured. Dominant themes included; collaborative learning, increased microbiology presence, accessibility to education, barriers and administrative issues.ConclusionFormal diagnostic stewardship educational programmes should be integrated into post-graduate curriculums for both NCHDs and consultants. Focuses for educational interventions include; development of local diagnostic stewardship guidelines, teaching on the cost and accuracy of microbiology tests, senior supervision and role-modelling.© 2025. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.

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