Table 2.

Prevalence of baseline abnormal US findings for tenosynovitis, tendinitis and ligament inflammation in PMR-definite, PMR-mimic and RA groups

	Present either unilaterally or bilaterally					Present bilaterally
	PMR-definite	PMR-mimic	RA	P-value		PMR-definite	PMR-mimic	RA	P-value
				vs PMR-mimic	vs RA				vs PMR-mimic	vs RA
Shoulder component, n (%)
LHBT	53 (88)	3 (14)	22 (37)	<0.001	<0.001	42 (70)	1 (5)	10 (17)	<0.001	<0.001
SScT	39 (65)	0 (0)	7 (12)	<0.001	<0.001	18 (30)	0 (0)	1 (2)	0.002	<0.001
SSpT	39 (65)	2 (10)	6 (10)	<0.001	<0.001	20 (33)	0 (0)	3 (5)	0.002	<0.001
Shoulder combination, n (%)
Tendinitis (SScT and/or SSpT)	50 (83)	2 (10)	12 (20)	<0.001	<0.001	28 (47)	0 (0)	4 (7)	<0.001	<0.001
Any (LHBT, SScT and/or SSpT)	58 (97)	5 (24)	27 (45)	<0.001	<0.001	50 (83)	1 (5)	11 (18)	<0.001	<0.001
Knee component, n (%)
MCL	29 (48)	0 (0)	5 (8)	<0.001	<0.001	18 (30)	0 (0)	1 (2)	0.002	<0.001
LCL	35 (58)	0 (0)	11 (18)	<0.001	<0.001	19 (32)	0 (0)	6 (10)	0.001	0.003
PopT	53 (88)	1 (5)	19 (32)	<0.001	<0.001	40 (67)	0 (0)	10 (17)	<0.001	<0.001
Knee combination, n (%)
Ligament (MCL and/or LCL)	42 (70)	0 (0)	13 (22)	<0.001	<0.001	28 (47)	0 (0)	6 (10)	<0.001	<0.001
Any (MCL, LCL and/or PopT)	54 (90)	1 (5)	23 (38)	<0.001	<0.001	47 (78)	0 (0)	11 (18)	<0.001	<0.001
All combinations, n (%)
Any shoulder (LHBT, SScT, SSpT) or any knee (MCL, LCL, PopT)	58 (97)	6 (29)	36 (60)	<0.001	<0.001	57 (95)	1 (5)	18 (30)	<0.001	<0.001
Any shoulder (LHBT, SScT, SSpT) and any knee (MCL, LCL, PopT)	54 (90)	0	14 (23)	<0.001	<0.001	40 (67)	0 (0)	4 (7)	<0.001	<0.001

P-values were calculated by χ² test or Fisher’s exact test for the difference between PMR-definite vs PMR-mimic or RA with Bonferroni correction. LHBT: long head of biceps tendon; SScT: subscapularis tendon; SSpT: supraspinatus tendon; MCL: medial collateral ligament; LCL: lateral collateral ligament; PopT: popliteus tendon.