Prevalence and risk factors of threshold and sub-threshold psychiatric disorders in primary care

Objective: Prevalence rates of mental health problems in primary care vary according to population and the type of measure used. This study examined the prevalence of a full range of mental health problems, including sub-threshold diagnoses, and the socio-demographic risk factors for psychiatric disorders among a population with low out-of-pocket expenditures for medical care. Method: Four validated mental health assessment instruments, including the CIDI-SF, were administered to a sample of 976 users of primary care in Israel between the ages of 25-75 in eight clinics throughout the country. Prevalence estimates were obtained for seven psychiatric diagnoses, two "other mental health disorders" (somatization and disordered eating) and five sub-threshold conditions. Results: The most common types of morbidity were depression and disordered eating (20.6% and 15.0%, respectively), followed by somatization (11.8%) and general anxiety (11.2%). Among respondents, 31.1% had at least one psychiatric diagnosis, 24.3% had "other mental disorders" and 15.5% had sub-threshold conditions. Panic attack, disordered eating and somatization, as well as a global measure of any psychiatric diagnosis were significantly more prevalent among women than men. Psychiatric diagnoses were also more common among those in the age group 45-64, with less education and insufficient income, the never married and separated/divorced and those not working. No significant differences were found between recent immigrants, veteran immigrants and Israeli-born, between Arab and Jewish Israelis or between secular or religious sectors of the population. Conclusions: This study establishes the prevalence of the most common disorders in primary care including PTSD, somatization and disordered eating behaviors. The additional of other mental disorders suggests that a more accurate picture of mental disorders in primary care requires an expanded assessment procedure.