The majority of the studies included in the review
(16) are European. Apart from one study of 15
European countries, the rest of the European papers
cover 10 different countries in total. Seven papers
are based on data from North America and five on
data from Australasia. One study is international,
with data from 21 developed countries. Only two of
the studies are specific to the UK. Outcomes include
suicidal ideation, suicide in individuals and area-level
suicide rates. Nineteen studies used individual-level
data and 10 compared area-level suicide rates.