*3.1. Studies Identified*

Eight articles fulfilled inclusion criteria, of 64 meeting search criteria (Figure 1). Included studies were published between 1979 and 2015, with characteristics summarised in Table 1. Studies reported suicide data specific to young men over 1970–2011. There was grea<sup>t</sup> heterogeneity of time periods studied, ranging from rates for single years, to an aggregated period of 41 years (1970–2011) [18]. There was also grea<sup>t</sup> heterogeneity of measures presented (absolute numbers; suicide rates per 100,000 inhabitants; suicide rates per 100,000 person-years), prohibiting meta-analysis. Whilst one study used a case-control design [19], the remaining seven presented cross-sectional data derived from national suicide registers (based on death certificates and police reports), or from these primary sources themselves. Six of those seven aggregated data for the periods of interest, but one presented data for seven specific years over 1970–1995 [20], although but only for West Greenland where suicide rates are lower than for East Greenland or the capital Nuuk [21]. Seven studies reported suicide data on Greenlandic individuals of all ages, from which we were able to extract selected findings relating to men aged 15–29. One study concentrated solely on young people aged 15–30 [22]. Two only reported data only from West Greenland [20] or Nuuk [19].

**Figure 1.** Flow diagram summarising the study selection process.






*Int. J. Environ. Res. Public Health* **2018**, *15*, 2442



significantly more likely to report lifetime suicidal thoughts.



subsequent suicide was not presented by gender or age

group.
