Table 3: Morphometric study results.

Venous limb diameterArterial limb diameter Loop diameter Loop amplitude Linear density (Loops/2 mm) Tortuosity (Twisted capillaries/4 mm)

Pso 17.6 μm ± 5.2 15.3 μm ± 4.3 26.8 μm ± 6.3 42.2 μm ± 10.3 13.2 ± 2.110.5 ± 2.1
PsA 18 μm ± 5.4 15.1 μm ± 3 27.2 μm ± 7.1 40.4 μm ± 9.1 13.1 ± 112.2 ± 3.2
RA22 μm ± 4.116.2 μm ± 4.130 μm ± 856 µm ± 1216 ± 27.1 ± 1.2
Controls 17.5 μm ± 3.1 14 μm ± 3.2 26.4 μm ± 5 46.1 μm ± 10 16.4 ± 2.66.2 ± 1.1

Pso versus controls N.S. N.S. N.S.
PsA versus controls N.S. N.S. N.S.
RA versus controls N.SN.S.
PsA versus RA
Pso versus RA
Pso versus PsA N.S. N.S. N.S. N.S. N.S. N.S.

Data are expressed as mean ± SD.
Statistical significance was assessed with Student’s -test; significance was set at 5.