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Cognition, structural brain changes and complicated grief. A population-based study

Published online by Cambridge University Press:  03 November 2014

H. C. Saavedra Pérez
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
M. A. Ikram
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
N. Direk
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
H. G. Prigerson
Affiliation:
Department of Psychiatry, Brigham and Women's Hospital, Boston, MA, USA Harvard Medical School, Center for Psychosocial Epidemiology and Outcomes Research, Boston, MA, USA Center for Psycho-Oncology and Palliative Care, Dana Farber Cancer Institute, Boston, MA, USA
R. Freak-Poli
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Epidemiology and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
B. F. J. Verhaaren
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
A. Hofman
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
M. Vernooij
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Radiology, Erasmus Medical Center, Rotterdam, The Netherlands
H. Tiemeier
Affiliation:
Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands Department of Child and Adolescent Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands Department of Psychiatry, Erasmus Medical Center, Rotterdam, The Netherlands
Corresponding
E-mail address:

Abstract

Background

Several psychosocial risk factors for complicated grief have been described. However, the association of complicated grief with cognitive and biological risk factors is unclear. The present study examined whether complicated grief and normal grief are related to cognitive performance or structural brain volumes in a large population-based study.

Method

The present research comprised cross-sectional analyses embedded in the Rotterdam Study. The study included 5501 non-demented persons. Participants were classified as experiencing no grief (n = 4731), normal grief (n = 615) or complicated grief (n = 155) as assessed with the Inventory of Complicated Grief. All persons underwent cognitive testing (Mini-Mental State Examination, Letter–Digit Substitution Test, Stroop Test, Word Fluency Task, word learning test – immediate and delayed recall), and magnetic resonance imaging to measure general brain parameters (white matter, gray matter), and white matter lesions. Total brain volume was defined as the sum of gray matter plus normal white matter and white matter lesion volume. Persons with depressive disorders were excluded and analyses were adjusted for depressive symptoms.

Results

Compared with no-grief participants, participants with complicated grief had lower scores for the Letter–Digit Substitution Test [Z-score −0.16 v. 0.04, 95% confidence interval (CI) −0.36 to −0.04, p = 0.01] and Word Fluency Task (Z-score −0.15 v. 0.03, 95% CI −0.35 to −0.02, p = 0.02) and smaller total volumes of brain matter (933.53 ml v. 952.42 ml, 95% CI −37.6 to −0.10, p = 0.04).

Conclusions

Participants with complicated grief performed poorly in cognitive tests and had a smaller total brain volume. Although the effect sizes were small, these findings suggest that there may be a neurological correlate of complicated grief, but not of normal grief, in the general population.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2014 

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