Objectives: There has been increased attention to university students' experiences of menstrual disorders, and access to menstrual products, in high-income countries. Less attention has been directed to other aspects of their menstrual experience, including confidence for menstrual management. This study aimed to understand the factors affecting university students' confidence to manage menstruation at university.

Methods: An online survey was completed by 410 participants (age range: 16-46 years, mean = 20.1 years) who menstruate and study at an Australian university. Participants reported demographic characteristics, confidence to manage menstruation at university, and personal, physical and environmental factors. A Mann-Whitney U-test analysed differences in confidence between groups of students. Pearson's correlation coefficient and bivariate linear regressions determined associations between factors and confidence. Statistically significant associations were inputted into a multiple linear regression model. P-values less than 0.05 were considered significant.

Results: A minority of students (16.2%) felt completely confident to manage their menstruation at university. Menstrual knowledge, positive perceptions of menstruation and comfort to discuss menstruation with others positively predicted confidence. Physical menstrual symptoms, negative perceptions of menstruation, perceived stigma and using a menstrual cup or period underwear predicted lower confidence. In multiple regression, private and clean and sanitary university bathroom facilities, changing menstrual products at university, perceived stigma and negative perceptions of menstruation remained significant predictors.

Conclusion: Most students did not have complete confidence to manage their menstruation at university. Several personal, physical and environmental factors were related to students' confidence to manage menstruation. Assessment of these factors in future research with university students is recommended to enable a comprehensive understanding of their menstrual needs, and inform interventions aimed at improving their menstrual management confidence at university.