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Can Community Social Cohesion Prevent Posttraumatic Stress Disorder in the Aftermath of a Disaster? A Natural Experiment From the 2011 Tohoku Earthquake and Tsunami

Hikichi, Hiroyuki ; Aida, Jun ; Tsuboya, Toru ; Kondo, Katsunori ; Kawachi, Ichiro

American Journal of Epidemiology, 2016, Vol. 183(10), pp.902-910 [Evalué par les pairs]

  • Titre :
    Can Community Social Cohesion Prevent Posttraumatic Stress Disorder in the Aftermath of a Disaster? A Natural Experiment From the 2011 Tohoku Earthquake and Tsunami
  • Auteur : Hikichi, Hiroyuki ; Aida, Jun ; Tsuboya, Toru ; Kondo, Katsunori ; Kawachi, Ichiro
  • Notes : In the aftermath of a disaster, the risk of posttraumatic stress disorder (PTSD) is high. We sought to examine whether the predisaster level of community social cohesion was associated with a lower risk of PTSD after the earthquake and tsunami in Tohoku, Japan, on March 11, 2011. The baseline for our natural experiment was established in a survey of older community-dwelling adults who lived 80 kilometers west of the epicenter 7 months before the earthquake and tsunami. A follow-up survey was conducted approximately 2.5 years after the disaster. We used a spatial Durbin model to examine the association of community-level social cohesion with the individual risk of PTSD. Among our analytic sample ( n = 3,567), 11.4% of respondents reported severe PTSD symptoms. In the spatial Durbin model, individual- and community-level social cohesion before the disaster were significantly associated with lower risks of PTSD symptoms (odds ratio = 0.87, 95% confidence interval: 0.77, 0.98 and odds ratio = 0.75, 95% confidence interval: 0.63, 0.90, respectively), even after adjustment for depression symptoms at baseline and experiences during the disaster (including loss of loved ones, housing damage, and interruption of access to health care). Community-level social cohesion strengthens the resilience of community residents in the aftermath of a disaster.
  • Liens : American Journal of Epidemiology, 2016, Vol. 183(10), pp.902-910 [Evalué par les pairs]
  • Sujets : Community Social Cohesion ; Disaster ; Disaster Resilience ; Japan ; Posttraumatic Stress Disorder ; Spatial Durbin Model
  • Type : Article
  • ISSN: 0002-9262 ; E-ISSN: 1476-6256 ; DOI: 10.1093/aje/kwv335

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