Background: Adolescent girls should practice good menstrual hygiene to enhance their health and educational attainment. However, socio-cultural restrictions and limited water, sanitation, and hygiene in school environments continued to make it difficult for in school adolescent females to practice good menstrual hygiene management. So, the main aim of this study was to assess menstrual hygiene management practice and its associated factors among in-school adolescent girls in the secondary schools of Gimbi town, western Ethiopia.

Methods: A school-based cross-sectional study was conducted among 378 adolescent girls in Gimbi town secondary schools. The study participants were selected by using stratified random sampling techniques. Pretested self-administered Afan Oromo questionnaire with sociodemographic characteristics, information and knowledge about menstruation, and practice of menstrual hygiene management, as well as observational checklist to assess school environment were used to collect the data. Data were cleaned, coded, and entered into Epi-info version 7.2.0.4 and exported to SPSS version 25 for statistical analysis. Multivariable logistic regression analysis was used to identify factors associated with the practice of menstrual hygiene management and P-values less than 0.05 was used to declare statistical significance.

Results: Out of 378 respondents, 163 (43.1%) (38-48) of adolescent girls had good menstrual hygiene management practice. Being urban resident (AOR = 3.48, (95% C.I:1.99-6.08), having mother with secondary level of education (AOR = 2.71, 95%CI: 1.15,6.42), having mother with educational level of college and above (AOR = 3.30, 95%CI1.28,8.50), having discussion about menstruation with parents (AOR = 2.42,95%CI:1.45,4.04), and having knowledge about menstruation (AOR = 2.94, 95% CI: 1.69-5.13) were factors associated with good menstrual hygiene management practice.

Conclusion: In this study, good menstrual hygiene management practice is low among in school adolescent girls. Place of residence, maternal educational level, discussion about menstrual issue with parent, and having knowledge about menstruation were factors associated with good menstrual management practice. Stakeholders should give appropriate awareness and health education related to menstrual hygiene for adolescent girls at all levels.