The phrase "clinical severity" refers to how serious or severe a medical condition or illness is. It describes the level of impact the condition has on a person's health and how much it affects their daily life. Full definition
Important mental health services are provided to college students by college based counselling services, and college students do experience mental health problems of clinical severity. (ebmh.bmj.com)
Ratings were made on a scale of 0 to 6 with a rating of 4 or more indicating clinical levels of severity and a rating of 3 indicating borderline clinical severity. (journals.plos.org)
Principal anxiety or any anxiety diagnosis (diagnosis considered present if Clinical Severity Rating (CSR) > 4 based on structured interview with... (ebmh.bmj.com)