摘要:The aims of this paper are to investigate the change in prevalence of psychological distress (PD), to investigate the cumulative incidence of the psychological distress and to indicate are there any differences between genders and various age groups in Croatian adult population. Psychological distress status was measured by the five-item Mental Health Scale (MHI-5) of the Short Form questionnaire (SF-36). Psychological distress was present in 28.5% (95% CI 25.7%–31.2%) of men and 32.1% (95% CI 30.1%–34.0%) of women in 2003. In 2008 PD was present in 33.0% (95% CI 30.1%–35.9%) of men and 34.1% (95% CI 32.1%–36.0%) of women. The highest incidence of PD, both for men and women, was in the oldest age group (>65 years). Results of this study demonstrating the fact that every third adult men and woman in Croatia are in psychological distress, the fact that there is an increase in PD prevalence for men and women should be taken into account in the future mental health policy planning.