Immunology / Treatment Outcome / Linear models / Humans / Patient Satisfaction / Clinical Sciences / Aged / Middle Aged / C reactive protein / Public health systems and services research / Reproducibility of Results / Biological markers / Polymyalgia Rheumatica / Clinical Sciences / Aged / Middle Aged / C reactive protein / Public health systems and services research / Reproducibility of Results / Biological markers / Polymyalgia Rheumatica