The Midlife Women's Symptom Index (MSI).

In this article, the Midlife Women's Symptom Index (MSI), a recently developed measurement scale for symptoms experienced during the menopausal transition, is presented with its psychometric properties. This was a cross-sectional study including (a) an expert review among 20 women's health experts and (b) a psychometric test among 77 middle-aged women. The instruments for the psychometric test were 19 questions on sociodemographic characteristics, the MSI, and the Menopausal Symptom Checklist (MSC). Data were analyzed using descriptive statistics, K-R 20, and item analysis. The reliability and validity of the MSI were supported among middle-aged women.