Aged Analgesics--therapeutic use Anti-Inflammatory Agents, Non-Steroidal--therapeutic use Cyclooxygenase Inhibitors--therapeutic use Drug Therapy, Combination Female Hip Prosthesis Humans Knee Prosthesis Male Middle Aged Orthopedic Procedures--methods Osteoarthritis--diagnosis Physical Therapy Modalities--methods Prognosis Risk Assessment Sensitivity and Specificity Severity of Illness Index Treatment Outcome