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Featured researches published by Natalino Tam.


The Lancet Global Health | 2014

Effects of recurrent violence on post-traumatic stress disorder and severe distress in conflict-affected Timor-Leste: a 6-year longitudinal study

Derrick Silove; Belinda J. Liddell; Susan Rees; Tien Chey; Angela Nickerson; Natalino Tam; Anthony B. Zwi; Robert Brooks; Lazaro Lelan Sila; Zachary Steel

BACKGROUND Little is known about the effect of recurrent episodes of communal violence on mental health in countries recovering from mass conflict. We report results of a 6-year longitudinal study in post-conflict Timor-Leste assessing changes in mental health after a period of communal violence. METHODS We assessed 1022 adults (600 from a rural village, 422 from an urban district) exposed to mass conflict during the Indonesian occupation after independence in 2004, and again in 2010-11, following a period of internal conflict. We took a census of all adults living at the two sites. The survey included measures of post-traumatic stress disorder, severe distress, traumatic events, poverty, ongoing conflict, and injustice. FINDINGS 1247 (80%) of 1554 invited adults participated in the baseline survey. 1038 (89% of those eligible) were followed up. The analysis included 1022 people who had sufficient data at baseline and follow-up. The prevalence of post-traumatic stress disorder increased from 23 of 1022 (2.3%) in 2004, to 171 of 1022 (16.7%) in 2010. The prevalence of severe distress also increased, from 57 of 1022 (5.6%) in 2004, to 162 of 1022 (15.9%) in 2010. Both these outcomes were associated with disability at follow-up. Having post-traumatic stress at follow-up was associated with being a woman (odds ratio [OR] 1.63, 95% CI 1.14-2.32), experience of human rights trauma (OR 1.25, 95% CI 1.07-1.47), or exposure to murder (OR 1.71, 95% CI 1.38-2.10) during the Indonesian occupation (1975-99), human rights trauma during the period of internal violence in 2006-07 (OR 1.46, 95% CI 1.04-2.03), and ongoing family or community conflict (OR 1.80, 95% CI 1.15-2.80) or preoccupations with injustice for two or three historical periods (OR 4.06, 2.63-6.28). Severe distress at follow-up was associated with health stress (OR 1.47, 1.14-1.90), exposure to murder (OR 1.57, 1.27-1.95), and natural disaster (OR 1.65, 1.03-2.64) during the Indonesian occupation, conflict-related trauma during the internal violence (OR 1.33, 1.02-1.74), and ongoing poverty (OR 1.53, 1.36-1.72) or preoccupations with injustice for two or three historical periods (OR 2.09, 1.25-3.50). INTERPRETATION Recurrent violence resulted in a major increase in post-traumatic stress disorder and severe distress in a community previously exposed to mass conflict. Poverty, ongoing community tensions, and persisting feelings of injustice contributed to mental disorders. The findings underscore the importance of preventing recurrent violence, alleviating poverty, and addressing injustices in countries emerging from conflict. FUNDING Australian National Health and Medical Research Council.


PLOS ONE | 2013

Intermittent explosive disorder amongst women in conflict affected Timor-Leste: associations with human rights trauma, ongoing violence, poverty, and injustice.

Susan Rees; Derrick Silove; Teresa Verdial; Natalino Tam; Elisa Savio; Zulmira Fonseca; Rosamund Thorpe; Belinda J. Liddell; Anthony B. Zwi; Kuowei Tay; Robert Brooks; Zachary Steel

Introduction Women in conflict-affected countries are at risk of mental disorders such as posttraumatic stress disorder and depression. No studies have investigated the association between experiences of abuse and injustice and explosive anger amongst women in these settings, and the impact of anger on womens health, family relationships and ability to participate in development. Methods A mixed methods study including an epidemiological survey (n = 1513, 92.6% response) and qualitative interviews (n = 77) was conducted in Timor-Leste. The indices measured included Intermittent Explosive Disorder, posttraumatic stress disorder; severe distress; days out of role (the number of days that the person was unable to undertake normal activities); gender-specific trauma; conflict/violence; poverty; and preoccupations with injustice. Results Women with Intermittent Explosive Disorder (n = 184, 12.2%) were more disabled than those without the disorder (for >5 days out of role, 40.8% versus 31.5%, X2 (2)  = 12.93 p = 0.0016). Multivariable associations with Intermittent Explosive Disorder, controlling for the presence of PTSD, psychological distress and other predictors in the model, included the sense of being sick (OR 1.73; 95% CI 1.08–2.77); victimization as a result of helping the resistance movement (OR 2.33, 95% CI 1.48–3.68); war-related trauma specific to being a woman (OR 1.95, 95%, CI 1.09–3.50); ongoing family violence and community conflict (OR 1.88, 95% CI 1.27–2.77); extreme poverty (OR 1.23, 95%, CI 1.08–1.39); and distressing preoccupations with injustice (relating to 2/3 historical periods, OR 2.10, 95% CI 1.35–3.28). In the qualitative study, women elaborated on the determinants of anger and its impact on their health, family and community functioning, child-rearing, and capacity to engage in development. Women reflected on the strategies that might help them overcome their anger. Conclusions Intermittent Explosive Disorder is prevalent and disabling amongst women in conflict-affected Timor-Leste, impacting on their health, child-rearing and ability to participate fully in socio-economic development.


Journal of Affective Disorders | 2013

Achieving convergence between a community-based measure of explosive anger and a clinical interview for intermittent explosive disorder in Timor-Leste

Belinda J. Liddell; Derrick Silove; Kuowei Tay; Natalino Tam; Angela Nickerson; Robert Brooks; Susan Rees; Anthony B. Zwi; Zachary Steel

BACKGROUND There is growing research interest in understanding and analyzing explosive forms of anger. General epidemiological studies have focused on the DSM-IV category of Intermittent Explosive Disorder (IED), while refugee and post-conflict research have used culturally-based indices of explosive anger. The aim of this study was to test the convergence of a culturally-sensitive community measure of explosive anger with a structured clinical interview diagnosis of IED in Timor-Leste, a country with a history of significant mass violence and displacement. METHODS A double-blind clinical concordance study was conducted amongst a stratified community sample in post-conflict Timor-Leste (n=85) to compare a community measure of anger against the Structured Clinical Interview (SCID) module for IED. RESULTS Clinical concordance between the two measures was high: the area under the curve (AUC) index was 0.90 (95% CI: 0.83-0.98); sensitivity and specificity were 93.3% and 87.5% respectively. LIMITATIONS Response rates were modest due to the participants time commitments. CONCLUSIONS It is possible to achieve convergence between culturally-sensitive measures of explosive anger and the DSM-IV construct of IED, allowing comparison of findings across settings and populations.


Translational Psychiatry | 2016

A high-risk group of pregnant women with elevated levels of conflict-related trauma, intimate partner violence, symptoms of depression and other forms of mental distress in post-conflict Timor-Leste

Susan Rees; Wietse A. Tol; M Mohammad; Alvin Kuowei Tay; Natalino Tam; N. dos Reis; E da Costa; Cesarina Soares; Derrick Silove

Women in post-conflict, low-income, post-conflict (LI-PC) countries are at risk of exposure to the traumatic events (TEs) of war and intimate partner violence (IPV), forms of stress that are known to lead to depression and other adverse mental health outcomes. We aimed to assess an index of exposure to these two forms of trauma to identify pregnant women attending antenatal clinics in conflict-affected Timor-Leste at high risk of depression and other forms of stress. A large, cross-sectional study of women in the second trimester of pregnancy was conducted in the four main government antenatal clinics in Dili district of Timor-Leste, between May 2014, and January 2015. The sample consisted of 1672 consecutive women, 3 to 6 months pregnant, with a response rate of 96%. We applied the Edinburgh Postnatal Depression Scale, the Kessler-10 psychological distress scale and the Harvard Trauma Questionnaire. IPV was assessed by the World Health Organisation measure. Composite categories of conflict-related TEs and severity of IPV showed a dose–response relationship with depressive symptoms: for exposure to four or more conflict-related TEs and severe psychological IPV, the adjusted odds ratio (AOR) was 3.95 (95% confidence interval (CI) 2.10–7.40); for four or more TEs and physical abuse, AOR 8.16 (95% CI 3.53–18.85); and for four or more TEs and severe psychological and physical abuse, AOR 9.78 (95% CI 5.31–18.02). For any mental distress, the AOR for four or more TEs and severe psychological abuse was 3.60 (95% CI 2.08–6.23); for four or more TEs and physical abuse 7.03 (95% CI 3.23–15.29); and for four or more TEs and severe psychological and physical abuse the AOR was 10.45 (95% CI 6.06–18.01). Of 184 women (11% of the sample) who reported ⩾4 TEs and either physical abuse alone or in combination with severe psychological abuse, 78 (42%) reached threshold for depressive symptoms and 93 (51%) for any mental distress, a 10-fold increase in depressive and other mental health symptoms. Priority should be directed to providing urgent mental health and social interventions for this group of women. Our findings offer a framework for a tiered approach to detection, guiding prevention and intervention strategies for IPV and associated mental health problems in low-income post-conflict countries.


British Journal of Psychiatry Open | 2015

Prevalence and correlates of explosive anger among pregnant and post-partum women in post-conflict Timor-Leste

Derrick Silove; Susan Rees; Natalino Tam; Mohammed Mohsin; Alvin Kuowei Tay; Wietse A. Tol

Background Little is known about explosive anger as a response pattern among pregnant and post-partum women in conflict-affected societies. Aims To investigate the prevalence and correlates of explosive anger among this population in Timor-Leste. Method We assessed traumatic events, intimate partner violence, an index of adversity, explosive anger, psychological distress and post-traumatic stress disorder among 427 women (257 in the second trimester of pregnancy, 170 who were 3–6 months post-partum) residing in two districts of Timor-Leste (response >99%). Results Two-fifths (43.6%) had explosive anger. Levels of functional impairment were related to frequency of explosive anger episodes. Explosive anger was associated with age (>35 years), being married, low levels of education, being employed, traumatic event count, ongoing adversity and intimate partner violence. Conclusions A combination of social programmes and novel psychological therapies may assist in reducing severe anger among pregnant and post-partum women in conflict-affected countries such as Timor-Leste. Declaration of interest None. Copyright and usage


Australasian Psychiatry | 2011

Staff Management and Capacity Building Under Conditions of Insecurity: Lessons From Developing Mental Health Service and Research Programs in Post-Conflict Timor-Leste

Derrick Silove; Susan Rees; Natalino Tam; Belinda J. Liddell; Anthony B. Zwi

Objective: The task of staff capacity building is particularly important, albeit challenging, in low and middle income countries emerging from prolonged periods of persecution and conflict. Mental health professionals engaged in development and research projects are acutely aware of the impact of past and current conditions including trauma exposure, insecurity, and poverty on the capacity of local workers to acquire and apply skills. In this article we reflect on these challenges by drawing on our experience spanning 10 years of mental health work and capacity building in Timor-Leste. Conclusions: It is important to be proactive in identifying the needs and career objectives of workers early in any development initiative so that an effective program of capacity building can be initiated. Careful consideration needs to be given to ensure a compassionate and considered response to the psychosocial needs of staff, one that takes into account the impact of past trauma, ongoing insecurity and socioeconomic conditions on the capacity of workers to function effectively.


Psychological Medicine | 2017

Symptoms of post-traumatic stress disorder, severe psychological distress, explosive anger and grief amongst partners of survivors of high levels of trauma in post-conflict Timor-Leste.

Derrick Silove; Alvin Kuowei Tay; Zachary Steel; Natalino Tam; Z. Soares; Cesarina Soares; N. dos Reis; A. Alves; Susan Rees

BACKGROUND Little is known about the mental health of partners of survivors of high levels of trauma in post-conflict countries. METHOD We studied 677 spouse dyads (n = 1354) drawn from a community survey (response 82.4%) in post-conflict Timor-Leste. We used culturally adapted measures of post-traumatic stress disorder (PTSD), psychological distress, explosive anger and grief. RESULTS Latent class analysis identified three classes of couples: class 1, comprising women with higher trauma events (TEs), men with intermediate TEs (19%); class 2, including men with higher TEs, women with lower TEs (23%); and class 3, comprising couples in which men and women had lower TE exposure (58%) (the reference group). Men and women partners of survivors of higher TE exposure (classes 1 and 2) had increased symptoms of explosive anger and grief compared with the reference class (class 3). Women partners of survivors of higher TE exposure (class 2) had a 20-fold increased rate of PTSD symptoms compared with the reference class, a pattern that was not evident for men living with women exposed to higher levels of trauma (class 1). CONCLUSIONS Men and women living with survivors of higher levels of trauma showed an increase in symptoms of grief and explosive anger. The manifold higher rate of PTSD symptoms amongst women living with men exposed to high levels of trauma requires replication. It is important to assess the mental health of partners when treating survivors of high levels of trauma in post-conflict settings.


BMJ Open | 2016

Six-year trajectories of post-traumatic stress and severe psychological distress symptoms and associations with timing of trauma exposure, ongoing adversity and sense of injustice: a latent transition analysis of a community cohort in conflict-affected Timor-Leste.

Alvin Kuowei Tay; Susan Rees; Zachary Steel; Natalino Tam; Z Soares; C Soares; Derrick Silove

Objectives To identify the 6-year trajectories of post-traumatic stress symptoms (PTSS) and psychological distress symptoms, and examine for associations with timing of trauma exposure, ongoing adversity and with the sense of injustice in conflict-affected Timor-Leste. Setting A whole-of-household survey was conducted in 2004 and 2010 in Dili, the capital of Timor-Leste. Participants 1022 adults were followed up over 6 years (retention rate 84.5%). Interviews were conducted by field workers applying measures of traumatic events (TEs), ongoing adversity, a sense of injustice, PTS symptoms and psychological distress. Results Latent transition analysis supported a 3-class longitudinal model (psychological distress, comorbid symptoms and low symptoms). We derived 4 composite trajectories comprising recovery (20.8%), a persisting morbidity trajectory (7.2%), an incident trajectory (37.2%) and a low-symptom trajectory (34.7%). Compared with the low-symptom trajectory, the persistent and incident trajectories reported greater stress arising from poverty and family conflict, higher TE exposure for 2 historical periods, and a sense of injustice for 2 historical periods. The persistent trajectory was unique in reporting greater TE exposure in the Indonesian occupation, whereas the incident trajectory reported greater TE exposure during the later internal conflict that occurred between baseline and follow-up. Compared with the low-symptom trajectory, the incident trajectory reported a greater sense of injustice relating to the periods of the Indonesian occupation and independence. The persistent trajectory was characterised by a sense of injustice relating to the internal conflict and contemporary times. The recovery trajectory was characterised by the absence of these risk factors, the only difference from the low-symptom trajectory being that the former reported a sense of injustice for the period surrounding independence. Conclusions Our findings suggest that the timing of both TE exposure and the focus of a sense of injustice may differentiate those with persisting and new-onset mental health morbidity in settings of recurrent conflict.


Epidemiology and Psychiatric Sciences | 2017

The role of grief symptoms and a sense of injustice in the pathways to post-traumatic stress symptoms in post-conflict Timor-Leste

Alvin Kuowei Tay; Susan Rees; Zachary Steel; Belinda J. Liddell; Angela Nickerson; Natalino Tam; Derrick Silove

AIMS Grief symptoms and a sense of injustice may be interrelated responses amongst persons exposed to mass conflict and both reactions may contribute to post-traumatic stress disorder (PTSD) symptoms. As yet, however, there is a dearth of data examining these relationships. Our study examined the contributions of grief and a sense of injustice to a model of PTSD symptoms that included the established determinants of trauma events, ongoing adversity and severe psychological distress. The study involved a large population sample (n = 2964, response rate: 82.4%) surveyed in post-conflict Timor-Leste. METHODS The survey sites included an urban administrative area (suco) in Dili, the capital of Timor-Leste and a rural village located an hours drive away. Culturally adapted measures were applied to assess conflict related traumatic events (TEs), ongoing adversity, persisting preoccupations with injustice, symptoms of grief, psychological distress (including depressive symptoms) and PTSD symptoms. RESULTS We tested a series of structural equation models, the final comprehensive model, which included indices of grief symptoms and injustice, producing a good fit. Locating grief symptoms as the endpoint of the model produced a non-converging model. In the final model, strong associations were evident between grief and injustice (β = 0.34, s.e. = 0.02, p < 0.01) and grief and PTSD symptoms (β = 0.14, s.e. = 0.02, p < 0.01). The sense of injustice exerted a considerable effect on PTSD symptoms (β = 0.13, s.e. = 0.03, p < 0.01). In addition, multiple indirect paths were evident, most involving grief and a sense of injustice, attesting to the complex inter-relationship of these factors in contributing to PTSD symptoms. CONCLUSIONS Our findings support an expanded model of PTSD symptoms relevant to post-conflict populations, in which grief symptoms and a sense of injustice play pivotal roles. The model supports the importance of a focus on loss, grief and a sense of injustice in conducting trauma-focused psychotherapies for PTSD amongst populations exposed to mass conflict and violence. Further research is needed to identify the precise mechanisms whereby grief symptoms and the sense of injustice impact on PTSD symptoms.


Journal of Affective Disorders | 2016

Patterns of separation anxiety symptoms amongst pregnant women in conflict-affected Timor-Leste: Associations with traumatic loss, family conflict, and intimate partner violence.

Derrick Silove; Alvin Kuowei Tay; Wietse A. Tol; Natalino Tam; N. dos Reis; Z. da Costa; Cesarina Soares; Susan Rees

BACKGROUND Adult separation anxiety (ASA) symptoms are prevalent amongst young women in low and middle-income countries and symptoms may be common in pregnancy. No studies have focused on defining distinctive patterns of ASA symptoms amongst pregnant women in these settings or possible associations with trauma exposure and ongoing stressors. METHODS In a consecutive sample of 1672 women attending antenatal clinics in Dili, Timor-Leste (96% response), we assessed traumatic events of conflict, ongoing adversity, intimate partner violence (IPV), ASA, post-traumatic stress disorder (PTSD) and severe psychological distress. Latent Class Analysis was used to identify classes of women based on their distinctive profiles of ASA symptoms, comparisons then being made with key covariates including trauma domains of conflict, intimate partner violence (IPV) and ongoing stressors. RESULTS LCA yielded three classes, comprising a core ASA (4%), a limited ASA (25%) and a low symptom class (61%). The core ASA class reported exposure to multiple traumatic losses and IPV and showed a pattern of comorbidity with PTSD; the limited ASA class predominantly reported exposure to ongoing stressors and was comorbid with severe psychological distress; the low symptom class reported relatively low levels of exposure to trauma and stressors. LIMITATIONS The study is cross-sectional, cautioning against inferring causal inferences. CONCLUSIONS The core ASA group may be in need of immediate intervention given the high rate of exposure to IPV amongst this class. A larger number of women experiencing a limited array of non-specific ASA symptoms may need assistance to address the immediate stressors of pregnancy.

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Dive into the Natalino Tam's collaboration.

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Derrick Silove

University of New South Wales

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Susan Rees

University of New South Wales

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Alvin Kuowei Tay

University of New South Wales

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Zachary Steel

University of New South Wales

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Mohammed Mohsin

University of New South Wales

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Belinda J. Liddell

University of New South Wales

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Wietse A. Tol

Johns Hopkins University

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Angela Nickerson

University of New South Wales

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Anthony B. Zwi

University of New South Wales

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Zelia Maria Da Costa

University of New South Wales

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