Review ArticlePosttraumatic Stress Disorder in Peacekeepers A Meta-AnalysisSouza, Wanderson Fernandes MS*; Figueira, Ivan MD†; Mendlowicz, Mauro V. MD‡; Volchan, Eliane MD§; Portella, Carla Marques MD†; Mendonça-de-Souza, Ana Carolina Ferraz PhD§; Coutinho, Evandro Silva Freire MD*Author Information *Department of Epidemiology, National School of Public Health (ENSP-FIOCRUZ); †Institute of Psychiatry (IPUB-UFRJ), Federal University of Riode Janeiro, Rio de Janeiro; ‡Department of Psychiatry and Mental Health, Federal Fluminense Universiry, Niterói; and §Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil. This research was supported by Projeto Pro-Defesa (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) and by the National Counsel of Technological and Scientific Development (CNPq) through Grant 420122/2005-2 (Projeto Milênio-Federal Government of Brazil). Neither the Pro-Defesa nor the CNPq had further role in study design; in the collection, analysis, and interpretation of data; in the writing of the report; and in the decision to submit the paper for publication. Send reprint requests to Wanderson Fernandes Souza, Rua Irineu Correia, 71 ap. 105, Rio de Janeiro 21235-540, Brazil. E-mail: [email protected]. The Journal of Nervous and Mental Disease: May 2011 - Volume 199 - Issue 5 - p 309-312 doi: 10.1097/NMD.0b013e3182175180 Buy Metrics Abstract A meta-analysis was conducted to estimate the prevalence of posttraumatic stress disorder (PTSD) among peacekeepers. A systematic review was carried out using Medline, Institute for Scientific Information/Web of Science and Published International Literature on Traumatic Stress databases, leading to a total of 12 studies reporting PTSD estimates. Pooled current PTSD prevalence was 5.3%, ranging from 0.05% to 25.8%, and a metaregression was used to investigate the variables that could account for the lack of homogeneity. However, none of the extracted information was capable of explaining the heterogeneity of the estimates. Peacekeeping studies presented different methodologies such as several screening instruments and different times from the deployment to the moment of PTSD assessment. The wide difference found among those estimates highlights the importance of the creation of standards for PTSD evaluation among peacekeepers. © 2011 Lippincott Williams & Wilkins, Inc.