Psychiatric morbidity and predisposing factors in a primary care population in Madrid

The aim of this article is to estimate the prevalence of mental disorders in patients in primary care centers in an urban area of Madrid and to study possible associated risk factors.

Cross-sectional month prevalence was evaluated in two phases in an urban area of Madrid. The sample for the first phase included 635 individuals (aged 18-65 years), and the second phase included 320 individuals. Socio-demographic variables (age, sex, educational level, living conditions and country of origin) and clinical variables (psychiatric diagnosis and level of psychosocial stress) were studied. The instruments used for screening were the General Health Questionnaire (GHQ)-28 item questionnaire and the MULTICAGE-CAD 4test. The Mini International Neuropsychiatric Interview (M.I.N.I.) was used in the second phase (in 'possible cases' and 20% of the 'non-cases'). Prevalence was calculated using weighted logistic regression with the observed sampling fractions of the patients in study phase 2 as sample weights.

The month prevalence of mental disorders was 31.3% (95% confidence interval (CI) = [27.6, 35.2]). Anxiety disorders were the most frequent diagnoses with a prevalence of 22.4% (95% CI = [17.8, 27.1]), followed by depressive disorders (16.6%; 95% CI = [12.9, 20.3]), substance abuse or dependence disorders (5.6%; 95% CI = [3.2, 6.9]) and posttraumatic stress disorder (PTSD; 4.4%; 95% CI = [2.0, 2.8]). Factors associated with mental disorders were the presence of stressful life events in the previous 12 months, Latin American region of origin, being woman aged 25 and 34 years and having a low education level.