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      Risk Factors of Posttraumatic Stress Disorder among Survivors after the 512 Wenchuan Earthquake in China

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      PLoS ONE
      Public Library of Science

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          Abstract

          This study investigated the psychological reactions of survivors of the 512 Wenchuan earthquake in China and the risk factors associated with those reactions. The Impact of Event Scale-Revised (IES-R), Type D Scale-14 (DS14), a self-developed trauma experience questionniare, and a demographic questionnaire were administered to 956 earthquake survivors (389 males and 567 females) in Mianzhu, one of the cities most affected by the earthquake. The results showed that postraumatic stress disorder (PTSD) symptoms affected 84.8% of survivors one to two months after the earthquake. Significant risk factors associated with PTSD symptoms included: (1) being female; (2) older age; (3) higher exposure to traumatic events during the earthquake; and (4) negative affect in Type-D personality.

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          Most cited references45

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          DS14: standard assessment of negative affectivity, social inhibition, and Type D personality.

          Type D personality-a joint tendency toward negative affectivity (NA) and social inhibition (SI)-is related to poor cardiac prognosis, but there is no standard for assessing Type D. This study reports on the Type D Scale-14 (DS14) as a standard measure of NA, SI, and Type D. The study included 3813 participants (2508 from the general population, 573 cardiac patients, 732 hypertension patients). They all filled out the DS14, containing 7-item NA and SI subscales; 275 subjects also completed the NEO-FFI, and 121 patients filled out the DS14 twice. Factor analysis of the DS14 yielded 2 dominant traits; all of the NA and SI items loaded between 0.62 to 0.82 on their corresponding factor (N = 3678). The NA scale covered dysphoria, worry, and irritability; the SI scale covered discomfort in social interactions, reticence, and lack of social poise. The NA and SI scales were internally consistent (alpha = 0.88/0.86; N = 3678), stable over a 3-month period (test-retest r = 0.72/0.82) and not dependent on mood and health status (N = 121). NA correlated positively with neuroticism (r = 0.68); SI correlated negatively with extraversion (r = -0.59/-0.65). Scale-level factor analysis confirmed the construct validity of the DS14 against the NEO-FFI. Using a cutoff of 10 (NA > or =10 and SI > or =10), 1027 subjects (28%) were classified as Type D, 21% in the general population versus 28% in coronary heart disease and 53% in hypertension (p < or = .001). Age, sex, and Type D (odds ratio, 3.98; 95% confidence interval, 3.2-4.6; p <.0001) were independently associated with cardiovascular morbidity. The DS14 is a brief, psychometrically sound measure of negative affectivity and social inhibition that could readily be incorporated in epidemiologic and clinical research.
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            Psychometric properties of the Impact of Event Scale - Revised.

            This study investigated the psychometric properties of the Impact of Event Scale -- Revised (IES-R) in two samples of male Vietnam veterans: a treatment-seeking sample with a confirmed posttraumatic stress disorder (PTSD) diagnosis (N = 120) and a community sample with varying levels of traumatic stress symptomatolgy (N = 154). The scale showed high internal consistency (alpha = 0.96). Confirmatory factor analysis did not provide support for a three-factor solution corresponding to the three subscales of intrusion, avoidance, and hyperarousal. Exploratory factor analysis suggested that either a single, or a two-factor solution (intrusion/hyperarousal and avoidance), provide the best account of date. However, correlations among the subscales were higher in the community sample than in the treatment sample, suggesting that the IES-R may be sensitive to a more general construct of traumatic stress in those with lower symptom levels. The correlation between the IES-R and the PTSD Checklist was high (0.84) and a cutoff of 1.5 (equivalent to a total score of 33) was found to provide the best diagnostic accuracy.
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              Symptoms of posttraumatic stress disorder, depression, and anxiety among adolescents following the 2008 Wenchuan earthquake in China.

              This study examined the symptoms of posttraumatic stress disorder (PTSD), anxiety, and depression among 2,250 adolescents 6 months after the 2008 Wenchuan earthquake in China. Results showed that 15.8%, 40.5%, and 24.5% of participants reported clinical symptoms of PTSD, anxiety, and depression, respectively. Posttraumatic stress disorder, anxiety, and depression were highly comorbid. Risk factors for symptoms of the 3 disorders were female gender, older age, and earthquake disaster exposure. In addition, the interaction effects of residence (urban/rural) and number of siblings of study subjects on symptoms of the 3 disorders were examined. Implications of findings on intervention and prevention of mental health problems among adolescents after experiencing earthquake disasters are discussed. Copyright © 2011 International Society for Traumatic Stress Studies.
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                Author and article information

                Contributors
                Role: Editor
                Journal
                PLoS One
                plos
                plosone
                PLoS ONE
                Public Library of Science (San Francisco, USA )
                1932-6203
                2011
                25 July 2011
                : 6
                : 7
                : e22371
                Affiliations
                [1 ]Associate Professor, Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
                [2 ]Professor, Department of Applied Social Studies, City University of Hong Kong, Hong Kong
                Wayne State University, United States of America
                Author notes

                Conceived and designed the experiments: YZ. Performed the experiments: YZ. Analyzed the data: SMYH. Contributed reagents/materials/analysis tools: SMYH YZ. Wrote the paper: SMYH YZ.

                Article
                PONE-D-11-02894
                10.1371/journal.pone.0022371
                3143136
                21799838
                3bb0bcf0-d971-4cb3-8437-8244eb6a2430
                Zhang, Ho. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
                History
                : 7 February 2011
                : 22 June 2011
                Page count
                Pages: 6
                Categories
                Research Article
                Medicine
                Mental Health
                Psychiatry
                Anxiety Disorders
                Psychology
                Behavior
                Adjustment (Psychology)
                Psychological Stress
                Social and Behavioral Sciences
                Psychology
                Behavior
                Adjustment (Psychology)
                Clinical Psychology
                Psychological Stress

                Uncategorized
                Uncategorized

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