Functional Assessment of Cancer Therapy-Ovarian Symptom Index Questionnaire

**Semantic type:** Intellectual Product

**Definition:** A standardized 8-item rating scale for the assessment of symptom response to treatment for advanced ovarian cancer that was originally developed by Cella, et al. in 1997 and derived from the ovarian cancer-specific subscale of the Functional Assessment of Cancer Therapy (FACT-O).

**Synonyms:** - FAC049 - FOSI - FOSI