Objectives:
The article presents a study aiming to verify the intensification of personality disorder traits described in the ICD-11 classification in three groups with varying severities of mental health problems.

Methods:
The study was conducted in three groups differing in the severity of mental health problems: (1) a sample from the general population (N = 328; 61% women, M = 39.80; SD = 12.11); (2) a sample of people using psychotherapy or psychiatric consultations (N = 132; 68.2% women, M = 29.10; SD = 1.05); (3) a sample of people hospitalized in departments for the treatment of a personality disorder (N = 76; 76.3% women, M = 24.18; SD = 1.12). The intensification of pathological personality traits was measured using the Polish adaptation of the PiCD Questionnaire.

Results:
The results basically confirmed the expected trend that as the severity of mental health problems increases, the intensity of pathological personality trait-domains also increases. A statistically significant trend was observed in the case of four trait-domains: “Negative Affectivity”, “Detachment”, “Dissociality”, and “Disinhibition”, with the largest effect observed in “Negative Affectivity”. In the case of “Anankastia”, the expected trend was not confirmed.

Conclusions:
The obtained results confirm the theoretical and clinical usefulness of the dimensional model of personality disorders proposed in ICD-11, simultaneously noting the need for further research on the specificity of “Anankastia”.