Biomedical subjects

D S Thordarson

Publications and source records attributed to D S Thordarson.

6 recordsLinked to original sources

PubMed2001

Cognitive versus behavior therapy in the group treatment of obsessive-compulsive disorder.

This study examined the effects of cognitive-behavior therapy (CBT) compared with traditional behavior therapy (exposure and response prevention [ERP]) in the group treatment of obsessive-compulsive disorder. Of the 76 participants who started treatment, 38 were wait-listed for 3 months before treatment to assess possible course effects. Both treatments were superior to the control condition in symptom reduction, with ERP being marginally more effective than CBT by end of treatment and again at 3-month follow-up. In terms of clinically significant improvement, treatment groups were equivalent on the conclusion of treatment, but 3 months later significantly more ERP participants met criteria for recovered status. Only 1 of 7 belief measures changed with treatment improvement, and the extent of this cognitive change was similar between CBT and ERP groups. Discussion includes consideration of optimal formats for the delivery of different types of treatment.

Adolescent↗

PubMed2001

Posttraumatic stress disorder arising after road traffic collisions: patterns of response to cognitive-behavior therapy.

Road traffic collisions (RTCs) are common precipitants of posttraumatic stress disorder (PTSD). Two preliminary studies suggest that cognitive-behavior therapy (CBT) is, on average, effective in treating this disorder, although the major patterns of treatment outcome remain to be identified. Such outcomes might include treatment response, partial response, and response followed by relapse. To identify these patterns. 50 people with RTC PTSD completed a 12-week course of CBT, with outcome assessment extending to 3-month follow up. Dynamic cluster analyses revealed 2 replicable patterns of outcome: one for responders (n = 30) and one for partial responders (n = 20). Partial responders, compared with responders, tended to have more severe pretreatment numbing symptoms and greater anger about their RTC, along with lower global levels of functioning, greater pain severity and interference, and greater depression and were more likely to be taking psychotropic medications. Responders and partial responders did not differ in homework adherence, number of sessions attended, therapist effects, or stressors occurring during therapy or in the presence or absence of RTC-related litigation. Implications for enhancing treatment outcome are discussed.

Accidents, Traffic↗

PubMed1998

Claustrophobia and the magnetic resonance imaging procedure.

We examined fear induced by the magnetic resonance imaging (MRI) procedure in 80 adult patients who were undergoing the procedure for the first time. Participants completed self-report measures of claustrophobia, anxiety sensitivity, thoughts about the scan, and pain. Participants were assessed pre- and postscan, and at 1-month follow-up. Twenty-five percent of the participants experienced moderate to severe anxiety during the MRI scan. Prescan scores on the Claustrophobia Questionnaire (CLQ: Rachman and Taylor, 1993) significantly predicted participants' distress during the scan: pain and anxeity sensitivity did not. Furthermore, CLQ scores discriminated between participants who reported panic during the scan and participants who did not report panic. A brief screening instrument consisting of six items from the 29-item CLQ is suggested. This brief screening instrument administered prior to the scan may help identify in advance those people who are most likely to experience claustrophobic fear and, in particular, those who panic during the MRI procedure.

Adult↗

PubMed1995

Perceived responsibility: structure and significance.

Given the postulated significance of inflated responsibility in obsessive compulsive disorder (OCD), there is a need for clarification of the concept itself and a means for measuring such responsibility. Two psychometric studies were conducted in order to develop a reliable self-report scale. In the first study 291 students completed the specially constructed Responsibility Appraisal Questionnaire (RAQ). Four factors emerged: responsibility for harm, responsibility in social contexts, a positive outlook towards responsibility, and thought-action fusion (TAF). In the second study, 234 students completed a revised RAQ. Four comparable factors emerged, and the TAF subscale correlated significantly with measures of obsessionality, guilt, and depression. The correlations between TAF and obsessionality and guilt remained significant even after BDI scores were controlled. It is concluded that the broad concept of inflated responsibility needs to be qualified; the connection between inflated responsibility and OCD appears to be situation-specific and idiosyncratic. There is more inflated responsibility than there is OCD. The measured concept of inflated responsibility is multifactorial (harm, social, positive, and TAF), not unitary. The TAF factor appears to be particularly significant in OCD.

Adult↗

PubMed1995

Consistency of behavior: expect the unexpected.

Clinicians and lay people mistakenly expect behavior to be consistent across time and situations. However, the presence of a psychological disorder can cause large and seemingly inexplicable fluctuations in patient behavior. These fluctuations intrinsically are aversive, and increase the burden on family members. This article outlines the clinical implications of inconsistency in patient behavior. A practical set of guidelines for the mental health worked is issued.

Cost of Illness↗

PubMedDate not supplied

The Claustrophobia Questionnaire.

The content and psychometric properties of the Claustrophobia Questionnaire (CLQ) are described. An earlier version of the CLQ was developed to test the hypothesis that claustrophobia is comprised of two distinct but related fears--the fear of suffocation and the fear of restriction [J. Anxiety Disord. 7 (1993) 281.]. The scale was used to assess patients undergoing the magnetic resonance imaging (MRI) procedure [J. Behav. Med. 21 (1998) 255.] and in participants with panic disorder [J. Abnorm. Psychol. 105 (1996) 146; Taylor, S., Rachman, S., & Radomsky, A. S. (1996). The prediction of panic: a comparison of suffocation false alarm and cognitive theories. Unpublished data.]. On the basis of these studies, we decided to revise and shorten the CLQ, collect normative data, and provide information on the scale's predictive and discriminant validity as well as its internal consistency and test-retest reliability. This was done through a set of four interconnected studies that included psychometric analyses of undergraduate and community adult questionnaire responses and behavioural testing. Results indicate that the CLQ has good predictive and discriminant validity as well as good internal consistency and test-retest reliability. The CLQ appears to be a reliable and sensitive measure of claustrophobia and its component fears. We encourage the use of the CLQ in a variety of clinical and research applications. The scale is provided in this paper for public use.

Adult↗