PRTN3 and temporal arteritis: From the 137 patients meeting the inclusion criteria, we excluded two patients with onset before 2006, 23 patients with treatment initiation at other hospitals, one patient with follow-up termination during the observation period, 16 patients who received DMARDs or immunosuppressants besides MTX during the observation period, one patient who received cytotoxic chemotherapy for malignancy, seven patients with concurrent GCA, four patients with ACPA positivity, and one patient who did not have new-onset PMR.