Table 2 Student T test results on mean ages, percentage of collagen fibres, free and total testosterone levels in both the PR and NR. Results' Student T in both populations of patients: organic ED and psychogenic ED.

Positive Rigiscan

Negative Rigiscan

P

Age

70

56

.000 *

% Collagen Fibers

57.1

47.8

.000*

Total Testosterone

364 +/-18

671 +/-24

.000*

Free Testosterone

5.5 +/-0.4

7.8 +/-0.5

.000*