A role for event centrality in prolonged grief disorder.

Having a traumatic or negative event at the centre of one's identity is associated with adverse psychological outcomes including post-traumatic stress, depression, and prolonged grief disorder (PGD). However, direct investigation of the role of centrality of a bereavement-event in the maintenance of PGD symptoms is scarce and has not compared immediate and long-term changes in event centrality nor examined the nature of the loss. Data from bereaved partners and adult children in The Aarhus Bereavement Study at four time points over 26 months post-loss were included in this study. Participants completed a PGD symptom measure and the Centrality of Events Scale (CES) on each occasion. Results suggest that bereaved partners had higher PGD and CES scores than bereaved adult children at all four post-bereavement time points. Regardless of relationship type, maintaining higher CES scores over time predicted PGD symptoms, over and above initial symptoms. Our findings suggest a risk factor for maintaining PGD symptoms is the continued centrality of the bereavement to ones' life story and autobiographical memory. This finding links the mechanisms for maintaining PGD symptoms to those involved in other disorders such as post-traumatic stress, with implications for theoretical models of prolonged grief as well as treatment.