Intra- and inter-examiner Reproducibility of the menstrual hygiene management skills' rating by prepubescent girls in Japan

Prepubescent girls with intellectual disabilities and high support needs encounter difficulties with menstrual hygiene management (MHM) and require individualized education. However, no clear methodology exists for assessing the reliability and validity of premenstrual MHM skills. We developed a 17-item MHM assessment tool to determine the intra- and inter-examiner reproducibility of MHM skills. Prepubescents-9 with intellectual disabilities and 10 with typical development-were educated on menstruation and assessed by three examiners. The intra-class correlation coefficient (ICC) showed high reproducibility, with intra-examiner reproducibility (ICC [1.1]) ranging from 0.87 to 0.99, regardless of disability. Conversely, inter-examiner reproducibilities were ICC (2.1) = 0.69-0.92 and 0.50-0.94 and Kappa coefficients were 0.54-0.81 and 0.37-1.00 for girls with intellectual disability and others, respectively. Items such as lowering underwear and wrapping napkins were less reproducible despite disability. Ability did not affect reproducibility and was useful for identifying MHM changes pre- and post-menstrual education.