Correlation between the prevalence of serious mental distress and the proportion of the population aged 65 years or older among municipalities by the proportion of all workers engaged in primary industry.

The circles represent municipalities with a low proportion of all workers engaged in primary industry (r = 0.648, P = 0.003); the triangles represent municipalities with a high proportion of all workers engaged in primary industry (r = −0.267, P = 0.255).