Correlation between the prevalence of serious mental distress and the proportion of the population aged 65 years or older among municipalities by category of the estimated number of inpatients with mental illness.

The circles represent municipalities with a low estimated number of inpatients with mental illness (r = −0.247, P = 0.280); the triangles represent municipalities with a high estimated number of inpatients with mental illness (r = 0.626, P = 0.005).