[Post-herpetic neuralgia: clinical predictors and psychopathologic findings].

48 patients, who had had acute Herpes zoster were screened for a retrospective investigation concerning the development of post-herpetic neuralgia. Subjects with and without neuralgia were compared with respect to medical, demographic and psychological variables. Nine patients were excluded from the investigation because of reported pain, which was not due to Herpes zoster. From the 39 subjects who remained in the analysis, 59% had postherpetic neuralgia for at least three months, and 28% for more than a year. No medical or demographic risk factor was sufficient for a prediction of the pain group. By applying objective criteria to psychometric test protocols, an index was constructed which differed between the groups. The pain-group showed a higher frequency of psychopathological impairment than those without post-herpetic neuralgia. However, the psychopathology was not consistently related to the length of neuralgia or the intensity of persistent pain.