This pilot study aimed to explore knowledge, attitudes and confidence levels of Obstructive Sleep Apnoea (OSA) before and after case-based education among dental hygiene students. Moreover, to give an international perspective, this study included students from the US and Scandinavia. A longitudinal multicentre study assessed dental hygiene students' OSA knowledge, attitudes and confidence through a case-based education model. Students from six dental hygiene programmes in the US, Norway and Sweden participated from 2021 to 2022. The intervention group (N = 89) received preview material, live synchronous OSA lecture, case-based screening of fictitious patients and clinical practice using the STOP-Bang screening tool. Controls (N = 70) followed the standard curriculum. The Obstructive Sleep Apnoea Knowledge and Attitudes (OSAKA) questionnaire, comprising 18 knowledge and five attitude/confidence questions, was used. Reliability was assessed and nonparametric tests determined OSAKA knowledge score differences among the baseline, 6 months and 12 months intervals. The intervention increased OSA knowledge with the largest increase in proportions of correct responses occurring between the baseline and 6 months and all single items showing a higher proportion of correct answers at 12 months compared to the baseline. Students' attitudes regarding the importance of OSAKA and confidence in managing patients increased from the baseline to both 6 months and 12 months. The case based educational intervention increased OSA knowledge and improved attitudes and confidence among dental hygiene students. The results also determined that the OSAKA questionnaire can be used in a setting with dental hygiene students to provide an overview of their knowledge, attitudes and confidence toward OSA. Current sleep medicine education in dental hygiene programmes is limited, suggesting the need for enhanced and sustained educational interventions to address this knowledge gap.
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