Economic Burden of Knee Osteoarthritis in Talavera de la Reina Health Area.

"Data related to the knee osteoarthritis will be extracted from patients' medical records:~The sociodemographic and clinical participants' characteristics: age, weight, height, duration of the condition, and occupational activity.~The healthcare costs: the number of visits in primary and specialized care, diagnostic tests, surgical interventions, and emergencies at both health centers and hospitals, physical rehabilitation and number of sessions.~Charlson Comorbidity Index (CCI). Pharmacotherapy (type of drug and dose). Work absences (temporary and permanent)."