Eur J Public Health. 2026 Jun 10;36(4):ckag087. doi: 10.1093/eurpub/ckag087.
ABSTRACT
Depressive disorders represent the second leading cause of disability globally, and Portugal reports the second highest prevalence in Europe. Nevertheless, the role of socioeconomic factors, behavioural determinants, and potential differences in treatment remain underexplored. This study assessed socioeconomic inequalities in depression and inequity in mental healthcare utilization among Portuguese adults aged 25-65 years, and evaluated whether health behaviours mediate the socioeconomic status (SES) and depression association. We used microdata from the 2019 Portuguese National Health Interview Survey. Depression was measured through self-report and PHQ-8 (≥10, moderate and moderately-severe; ≥20, severe). Concentration curves and indices, standardized by sex and age, assessed SES-related inequality in depression; horizontal inequity in mental healthcare utilization was estimated by adjusting for morbidity. Logistic regression models estimated the SES-depression association, and mediation by health behaviours (smoking, alcohol, sedentary lifestyle, diet, BMI) was evaluated using attenuation analysis. Overall, 13.0% reported depression in the previous year and 6.8% met PHQ-8 criteria. Both were disproportionately concentrated among lower-income groups, with the strongest inequality observed for severe depression. Horizontal inequity was also observed: specialist consultations were disproportionately used by higher-income groups when adjusting for self-reported depression, whereas medication was more concentrated among lower-income individuals meeting PHQ-8 criteria. Sedentarism, BMI, and alcohol drinking partially mediated SES-depression association, reducing effect estimates by up to 23.9%. Marked socioeconomic inequalities exist in depression and mental healthcare utilization in Portugal. Strengthening equitable access to evidence-based mental healthcare and addressing upstream behavioural and socioeconomic determinants are critical to reducing the national mental health burden.
PMID:42397976 | DOI:10.1093/eurpub/ckag087
