To evaluate the personality structure of young adults treated with renal re
placement therapy (RRT) since childhood, we studied 36 patients who had com
menced RRT before age 18. At the time of investigation 17 patients were dia
lyzed and 13 had a functioning renal transplant. Of the dialysis patients,
7 had been transplanted previously. These patients were compared to 26 youn
g adults (minimum age 16) with diabetes mellitus type 1 (DM) of comparable
duration. We used the FP1 test (half-form R; 138 items) by J. Fahrenberg to
evaluate personality structure in patients and controls. The results show
in general very little difference compared to published normal values and o
nly slight differences between the groups studied. However, there was a tre
nd for RRT patients to feel more aggressive and inhibited than patients wit
h DM. Transplanted patients tended to feel more worried about health proble
ms, while hemodialysis patients felt more self-assured than DM patients. Al
though it is difficult to assess the psychological burdens of chronic illne
ss and the influence of continuing psychosocial support, it seems remarkabl
e that a better than expected psychiatric adjustment has also been reported
in other studies of patients with RRT. In conclusion, adult patients with
RRT since childhood have a favorable personality profile as measured by sel
f-evaluation with the FP1-R test, inspite of the well-known multiple medica
l and social handicaps of this patient population.