Increased Incidence Rate of Trauma- and Stressor-related Disorders in Denmark Following the Breivik Attacks in Norway

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BACKGROUND:

On 22 July 2011, Anders Breivik killed 77 adults and children in Norway. Having recently documented increases in the incidence of trauma- and stressor-related disorders in Denmark after the 9/11 attacks, we hypothesized that the Breivik attacks-due to their geographic proximity-would be followed by even larger increases in Denmark.
METHODS:

Using population-based data from the Danish Psychiatric Central Research Register (1995-2012), we conducted an intervention analysis of the change in the incidence of trauma- and stressor-related disorders after the Breivik attacks.
RESULTS:

The incidence rate increased by 16% over the following 1½ years after the Breivik attacks, corresponding to 2736 additional cases. In comparison, 9/11 was followed by a 4% increase. We also present evidence of a subsequent surge in incidence stimulated by media attention.
CONCLUSION:

This study bolsters previous findings on extra-national consequences of terrorism and indicates that geographic proximity and media coverage may exacerbate effects.
Original languageEnglish
JournalEpidemiology
Volume28
Issue number6
Pages (from-to)906-909
ISSN1044-3983
DOIs
Publication statusPublished - Nov 2017

ID: 178355201