Validation of a German Version of the Patient Rated Tennis Elbow Evaluation

Inclusion Criteria: * At least 18 years of age * Diagnosed lateral epicondylitis * Receive a first ACP treatment at the Schulthess Klinik * Signed informed consent form Exclusion Criteria: * Lack of German language skills, which make it impossible to complete the questionnaire * Diseases or conditions that would prevent accurate evaluation (e.g. central neurological, psychiatric or metabolic diseases) * Legal incompetence * Recent operations on the elbow or hand (less than three months ago)