Patterns and predictors of the transition between minimally adequate treatment and effective treatment coverage for mental disorders: results from the World Mental Health Survey

Mental disorders remain widely undertreated, and even when individuals receive care, it is not always consistent with evidence-based guidelines. Using data from the World Mental Health surveys across 21 countries, this study examined how often patients receiving minimally adequate treatment (MAT) actually receive effective treatment coverage (ETC). Among 1,119 participants with nine common 12-month mental disorders, fewer than half (47.1%) of those receiving MAT received care that met criteria for effective treatment coverage.

Higher education, milder disorder severity, treatment from a mental health specialist, and receiving combined treatment (medication and counseling) were the strongest predictors of receiving ETC. Notably, combined treatment was most effective when provided by a psychiatrist rather than by multiple non-specialist providers. These findings highlight substantial gaps between minimally adequate care and treatment that fully aligns with clinical guidelines, underscoring the need to improve mental health service delivery and strengthen pathways from treatment entry to effective care.