Publications by authors named "Natasha Rawson"

Brain-Derived Neurotrophic Factor (BDNF) is implicated in extinction learning, which is a primary mechanism of exposure therapy for posttraumatic stress disorder (PTSD). Brief aerobic exercise has been shown to promote BDNF release and augment extinction learning. On the premise that the Val allele of the BDNF Val66Met polymorphism facilitates greater release of BDNF, this study examined the extent to which the Val allele of the BDNF polymorphism predicted treatment response in PTSD patients who underwent exposure therapy combined with aerobic exercise or passive stretching.

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Importance: Although grief-focused cognitive behavior therapies are the most empirically supported treatment for prolonged grief disorder, many people find this treatment difficult. A viable alternative for treatment is mindfulness-based cognitive therapy.

Objective: To examine the relative efficacies of grief-focused cognitive behavior therapy and mindfulness-based cognitive therapy to reduce prolonged grief disorder severity.

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Reliving distressing memories is a core component of treatments for post-traumatic stress disorder (PTSD) and prolonged grief disorder (PGD). There is little understanding of how reliving these memories functions in the treatment of these disorders. This study investigated whether reliving functions comparably in the treatment of PTSD and PGD, and whether it is comparably related to treatment outcome.

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Background: Although exposure therapy is central in most front-line psychotherapies of post-traumatic stress disorder (PTSD), many patients do not respond to this treatment. We aimed to investigate the effects of brief aerobic exercise on the efficacy of exposure therapy in reducing the severity of PTSD.

Methods: We did a single-blind, parallel, randomised controlled trial in Sydney, NSW, Australia.

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Introduction: Anxiety and depression have increased markedly during the COVID-19 pandemic. There is a lack of evidence-based strategies to address these mental health needs during the pandemic.

Objective: We aim to conduct a proof-of-concept trial of the efficacy of a brief group-based psychological intervention delivered via videoconferencing for adults in Australia distressed by the pandemic.

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Background: Emergency service personnel experience elevated rates of posttraumatic stress disorder (PTSD). There are few controlled trials for PTSD in this population, and none report longer term effects of treatment. This study evaluated the benefits of cognitive behavior therapy (CBT) for PTSD in emergency service personnel who received either brief exposure (CBT-B) to trauma memories or prolonged exposure (CBT-L) 2 years following treatment.

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: Prolonged grief disorder (PGD) causes significant impairment in approximately 7% of bereaved people. Although cognitive behaviour therapy (CBT) has been shown to effectively treat PGD, there is a need to identify predictors of treatment non-response. : PGD patients ( = 80) were randomly allocated to receive 10 weekly two-hour group CBT sessions and (a) four individual sessions of exposure therapy or (b) CBT without exposure.

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Background: Although emergency service personnel experience markedly elevated the rates of post-traumatic stress disorder (PTSD), there are no rigorously conducted trials for PTSD in this population. This study assessed the efficacy of cognitive behaviour therapy (CBT) for PTSD in emergency service personnel, and examined if brief exposure (CBT-B) to trauma memories is no less efficacious as prolonged exposure (CBT-L).

Method: One hundred emergency service personnel with PTSD were randomised to either immediate CBT-L, CBT-B or wait-list (WL).

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Background: Prolonged grief disorder (PGD) causes significant impairment in approximately 7% of bereaved people. Although cognitive-behavioral therapy (CBT) has been shown to effectively treat PGD, there is no evidence of long-term effects of CBT.

Objective: To determine the long-term efficacies of CBT with exposure or CBT without exposure in treating PGD by assessing outcome at 2 years.

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Importance: Prolonged grief disorder (PGD) is a potentially disabling condition that affects approximately 10% of bereaved people. Grief-focused cognitive behavior therapy (CBT) has been shown to be effective in treating PGD. Although treatments for PGD have focused on exposure therapy, much debate remains about whether exposure therapy is optimal for PGD.

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