Adolescent Adult Aged Aged, 80 and over Attitude of Health Personnel Communication Comprehension Cross-Sectional Studies Female Germany Health Knowledge, Attitudes, Practice Humans Informed Consent Male Middle Aged Orthopedic Procedures--adverse effects Patient Education as Topic Patient Satisfaction Patients--psychology Physician-Patient Relations Preoperative Period Referral and Consultation Risk Assessment Risk Factors Spine--surgery Surgeons--psychology Surveys and Questionnaires Young Adult