Disclaimer:The views and opinions expressed in this article are those of the authors and should not be construed to represent the views of WHO or other sponsoring organizations, agencies, or governments.
Additional Contributions:We thank the staff of the WMH Data Collection and Data Analysis Coordination centres for assistance with instrumentation, fieldwork, and consultation on data analysis.
Additional Information:A complete list of all within-country and cross-national WMH publications can be found at http:// www.hcp.med.harvard.edu/wmh/. Abstract IMPORTANCE-Previous research has documented significant variation in the prevalence of posttraumatic stress disorder (PTSD) depending on the type of traumatic experience (TE) and history of TE exposure, but the relatively small sample sizes in these studies resulted in a number of unresolved basic questions.OBJECTIVE-To examine disaggregated associations of type of TE history with PTSD in a large cross-national community epidemiologic data set.
DESIGN, SETTING, AND PARTICIPANTS-The World Health Organization World MentalHealth surveys assessed 29 TE types (lifetime exposure, age at first exposure) with DSM-IV PTSD that was associated with 1 randomly selected TE exposure (the random TE) for each respondent. Surveys were administered in 20 countries (n = 34 676 respondents) from 2001 to 2012. Data were analyzed from October 1, 2015, to September 1, 2016.
MAIN OUTCOMES AND MEASURES-Prevalence
Methods
SamplesThe WMH surveys are a coordinated set of community epidemiologic surveys in countries throughout the world. 17 This report focuses on the 22 WMH surveys in 20 countries that assessed lifetime PTSD after randomly selected TEs (using the procedures described below). Three surveys that assessed these random TEs were conducted in countries classified by the World Bank as low or lower-middle income (Colombia, Peru, and Ukraine); 7 in countries classified as upper-middle income (Brazil, Bulgaria, Colombia [administered after the previously mentioned Colombian survey, when the country income rating had increased], Lebanon, Mexico, Romania, and South Africa); and 12 in countries classified as high income (Belgium, France, Germany, Israel, Italy, Japan, the Netherlands, New Zealand, Northern Ireland, Spain [separate national and regional surveys], and the United States) (eTable 1 in the Supplement). Each survey was based on a multistage clustered area
Author Manuscript Author ManuscriptAuthor ManuscriptAuthor Manuscript probability sample of adult household residents. The target population was the entire country in most surveys, all urbanized areas in 3 (Colombia, Mexico, and Peru), and specific metropolitan areas in 4 (Sao Paulo, Brazil; Medellin, Colombia; Murcia, Spain; and 6 cities in Japan). Response rates ranged from 45.9% (France) to 97.2% (Medellin), with a mean rate of 71.3% across surveys. This study was approved by the institutional review boards of the participating institutions. Participants provided written or oral informed consent using procedures approved by...