telephone surveys

This is a subjective, knee-specific rating scale that is considered one of the most reliable assessment tools in the evaluation of knee pathologies. The questionnaire examines 3 categories: symptoms, sports activity and knee function. According to this questionnaire, a score between 0 and 100 can be obtained, whereby a high score is associated with a high level of function and minor pain symptoms. A score of 100 is in fact interpreted as a condition in which there are neither limitations in conducting activities of daily living nor symptoms.

The complete questionnaire consists of five subscales and covers: pain (9 items), symptoms (7 items of which two concern stiffness), functions and activities of daily living (17 items) physical function, sports and leisure activities (5 items) and quality of life in relation to the knee (4 items). All items of the relevant subscales have the same response mode, use a 5-point Likert scale and each question is assigned a score from 0 to 4, where 0 indicates "no difficulty" and 4 "severe difficulty".) Score range 0-100 for each subscale.

It is a visual analogue scale that has a range of scores between 0 (worst imaginable health condition) and 100 (best imaginable health condition).

allows one to estimate the motor activity level of a subject with a score between 0 and 10, where 0 represents 'inability' and 10 represents 'participation in competitive sports, such as football at national or international level. This score is the one most commonly used to define the motor activity level of patients with knee disorders.