Personality (according to Cloninger) responds to Biological aspects (temperamental) and Psychosocial (characterological), thereby forming the complex pattern of human behavior. High level of avoidance of harm and stiffness are factors associated with depressive disorders, closely linked to the Serotoninergic System. Melancholicus Typus (MT) is characterizes by its seriousness, scrupulousness of conscience, perfectionism, responsibility and order at all levels among other features.

Develop an inventory psychometrically to assess the influence of personality traits Melancholicus Typus in the appearance of resistant depression throughout life.

Retrospective observational study. We designed a questionnaire with a total of 70 items that shaped the personality of Melancholicus Typus. We explored the internal consistency using statistical factor analysis, as well as discriminate validity of these. This questionnaire was applied to the sample of 100 patients signed informed consent prior. They met criteria for inclusion/exclusion. The patient population is from the Institute of Psychiatry Rafael Coullaut. Madrid.

The existence of personality traits of Melancholicus Typus identifies a vulnerability to developing relevant resistant depression over the life of individuals. The inventory developed for this study is a useful test to assess personality traits such as Melancholicus Typus both clinical populations and general population.

The scale shows good construct validity, as well as good internal consistency through correlations Item/Total. The reliability of the scale is high.