. 2009 Dec 2;4(12):e8131. doi: 10.1371/journal.pone.0008131

Table 1. Mature and Immature Vessels in RA, OA or Normal Synovial Tissues.

	RA n = 82	OA n = 14	Normal n = 4	p-value*
CD31+/aSMA+ Vessels/mm²	294±95	74±28	94±44	<0.0001
CD31+/aSMA– Vessels/mm²	26±27	0.6±1.2	0±0	<0.0001
Total Vessels/mm²	319±98	74.5±28	94±44	<0.0001
Proportion of tissues with CD31+/aSMA– vessels (%)	66/82(80%)	3/14(21%)	0/4(0%)	<0.0001

CD31+/aSMA+: Mature vessels; CD31+/aSMA–: Immature vessels; Total vessels represents the sum of both mature and immature vessels.

(*) RA versus OA.