Semiquantitative Evaluation of Extrasynovial Soft Tissue Inflammation in the Shoulders of Patients with Polymyalgia Rheumatica and Elderly-Onset Rheumatoid Arthritis by Power Doppler Ultrasound

Table 1

Demographic and clinical characteristics of patients at the time of US examination.

Diagnosis	PMR	pm-EORA
Number of patients	15	15
Age (years)	72.6 ± 7.7	70.7 ± 7.0
Sex (female)	33.3%	46.7%
Disease duration (months)	1.7 ± 0.8	2.7 ± 1.1
Shoulder girdle stiffness	100%	100%
Bilateral shoulder pain	100%	86.7%
Peripheral joint involvement	13.3%	93.3%
Positive RF	6.70%	33.3%
Positive ACPA	0.0%	33.3%
Positive RF and/or ACPA	6.7%	40.0%
CRP (mg/dL)	9.3 ± 5.3	4.2 ± 5.0
ESR (mm/h)	102 ± 27	79 ± 30
MMP-3 (ng/ml)	255 ± 174	333 ± 366
2012 EULAR/ACR PMR criteria score ≧ 4	100%	60%
2010 ACR/EULAR RA criteria score ≧ 6	0.0%	66.6%
Initiation of antirheumatic drugs during one-year follow-up	20%	100%

a, data after one-year follow-up; b, mean ± standard deviation; c, ; ACPA, anti-citrullinated peptide antibody; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; MMP-3, matrix metalloproteinase 3; pm-EORA, elderly-onset rheumatoid arthritis with PMR-like onset; PMR, polymyalgia rheumatica; RF, rheumatoid factor; US, ultrasound.