Table 1.

Population epidemiology, histologic vessel density, and sonographic parameters.

Patient	Age, yrs	Sex	Epidemiology		ESR, mm/h	CRP mg/l	Experimental Procedures
			Disease	Disease Duration, yrs			Histology		Ultrasonography
			Disease	Disease Duration, yrs			Sections, (n)	Vessel Density^* (% of ROI area)	k > 0.01 (% of ROI area)	k_max
1	61	M	RA	1	19	10	18	4.3 ± 2.2	47.9	8.4
2	33	M	RA	5	87	66	14	6.0 ± 1.2	53.3	7.5
3	68	F	RA	2	58	67	9	7.7 ± 2.1	54.1	13.4
4	28	F	RA	6	12	3	20	6.1 ± 1.4	50.7	7.1
5	59	M	RA	18	17	7	20	3.0 ± 1.6	46.3	5.1
6	75	F	RA	3	14	15	10	2.1 ± 0.6	46.6	6.3
7	61	F	RA	7	41	38	20	7.3 ± 1.3	51.6	9.3
8	48	M	PsA	12	10	2	10	3.1 ± 1.8	43.9	8.7
9	43	M	PsA	3	24	15	8	4.1 ± 1.2	47.2	7.1
10	28	M	PsA	1	2	1	9	2.0 ± 0.8	41.7	3.9
11	53	M	OA	2	7	3	20	1.4 ± 0.5	41.1	5.5

↵* Mean value ± standard deviation. RA: rheumatoid arthritis; PsA: psoriatic arthritis; OA: osteoarthritis; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein (0–6 mg/l); ROI: region of interest.