Applying Cluster Analysis to Define a Typology of Chronic Fatigue Syndrome in a Medically-Evaluated,Random Community Sample

This study involved a randomly selected, medically-evaluated, community-based sample of 166 individuals with chronic fatigue. Participants diagnosed with chronic fatigue syndrome and medically-explained chronic fatigue reported significantly more severe fatigue following exertion than the idiopathic chronic fatigue group, and participants with medically-explained chronic fatigue also reported significantly more severe fatigue following exertion than the psychiatrically-explained chronic fatigue group. A cluster analysis was performed to define a typology of chronic fatigue symptomatology for participants diagnosed with chronic fatigue syndrome. Three clusters emerged. Cluster 1 contained only one participant with chronic fatigue syndrome and was characterized by relatively low post-exertional fatigue. Cluster 2 contained a small proportion of individuals with chronic fatigue syndrome and was characterized by most severe post-exertional fatigue and most improvement in fatigue following rest. Cluster 3 contained the highest proportion of individuals with chronic fatigue syndrome, and was characterized by high post-exertional fatigue and fatigue not alleviated by rest.     

An evaluation of support groups for patients with long-term chronic pain and complex psychosocial difficulties

There is a significant group of chronic pain patients with complex psychosocial needs who are frequent users of hospital outpatient departments and who do not participate in or benefit from traditional pain management treatments and are convinced there is a medical solution to their problems. They are a particularly challenging group of patients to help, often shunned by medical and psychological professionals. A new type of ten-session psycho-social group for these patients that is less demanding than traditional pain management group programmes is investigated. It is designed to foster the development into community-based self-help groups and reduce the need for professional support and unnecessary medical intervention. Accounts of four groups of patients who participated in support groups and successfully established their own groups is presented. To assess changes in motivation, mood and pain disability standardized questionnaire measures were given before and after group attendance. Findings suggest that patients benefited and took increased responsibility for their pain management but did not demonstrate positive changes on measures of mood or level of pain disability. Patients experienced satisfaction with the groups and established their own self-help community groups. The positive experience of participants and staff suggests further work with support groups would be productive for this group of patients.     

Quality of Life,Treatment Adherence,and Locus of Control: Multiple Family Groups for Chronic Medical Illnesses

The Multiple Family Groups (MFGs) approach for patients with a chronic medical illness and their families is a structured psychoeducational program that unfolds in six weekly 90‐minute sessions. In the MFGs, patients and family members explore new ways to balance illness and nonillness priorities in family life (Steinglass, 1998; Steinglass, 2000 Cuadernos de Terapia Familiar, 44‐45, 11; Steinglass, Ostroff, & Steinglass, 2011 Family Process, 50, 393).     

Chronic Pain Syndromes and Violence Against Women

Abstract

Chronic pain is a common form of disability, and is often reported among women with a history of victimization. In the present study, we combine six pain symptoms into a measure of self-reported pain, and compare women who have experienced child or domestic abuse with those who do not report such a history. A sample of 110 female patients (57 abused, 53 non-abused controls) was drawn from an adult primary-care practice of 905 patients in a small, affluent, predominantly Caucasian community in northern New England. The subjects ranged in age from 18 to 88 (M = 47). Subjects completed a self-administered questionnaire that was used clinically as part of the new-patient work-up. Women who reported either child or domestic abuse were significantly more likely to report pain symptoms than women in the control group. There was no significant difference between women who had experienced domestic abuse vs. child abuse alone. These findings held true even after controlling for depression.     

The reluctance to generalize corrective experiences in chronic low back pain patients: a questionnaire study of dysfunctional cognitions

The present study investigated whether pain catastrophizing and pain-related fear is related to a reluctance to generalize an experience of lesser pain than expected to other similar situations. Eighty-five patients with chronic low back pain (40 males; 45 females; age range=21-63 years) completed a series of vignettes assessing catastrophizing, overgeneralization, personalization and selective abstraction related to general life experiences and to low back pain (LBP) experiences. Three vignettes also assessed the lack of generalization of corrective experiences related to LBP. Our results showed that dysfunctional cognitions related to general life experiences were the strongest predictor of the self-denigration subscale of the Beck Depression Inventory (BDI), whereas only dysfunctional cognitions related to LBP had a unique contribution in the prediction of the somatic and physical function subscale of the BDI. Furthermore, dysfunctional cognitions related to LBP were significantly correlated with interference with daily life due to pain. As predicted, pain catastrophizing and pain-related fear had a unique contribution in predicting the lack of generalization of corrective experiences, over and above sociodemogaphic variables, pain severity and pain duration.     

How does persistent pain develop? An analysis of the relationship between psychological variables, pain and function across stages of chronicity

The fear-avoidance model is an attempt to underscore the importance of cognitive and behavioral factors, in a chain of events linking pain to disability. However, it is not clear at what time point the psychological variables within the model begin to be prominent. The aim of this study was to investigate the role of these psychological variables in the development of a chronic musculoskeletal pain problem. Three stages of chronicity, defined by duration of pain, provided a proxy for the developmental process: <1 year (N=48), 1-3 years (N=47) and >3 years (N=89). Subjects completed questionnaires on fear of movement, catastrophizing, depression, pain and function. The results indicate that the relationship between fear of movement and function is moderated by the stage of chronicity. Regression analyses showed that fear of movement did not explain any variance in the group with pain duration <1 year. Fear of movement did explain variance in the groups with pain duration of 1-3 years and >3 years. This suggests that the time point in the development of a musculoskeletal pain problem might be an essential aspect of the importance of the relationship between psychological components and function.     

Effects of varied-stimulus exposure on overpredictions of pain and behavioural performance in low back pain patients

The main objective of the present study was to investigate the benefits of exposure to a variety of movements versus exposure to the same movements on overprediction of pain and behavioural performance on a final behavioural test in a sample of chronic low back pain (CLBP) patients. Eighty-four CLBP patients were requested to perform four behavioural tests. Patients were assigned to two experimental conditions. The final behavioural test was the same for all patients. The first three behavioural tests consisted of three different movements in condition 1 and of three times the same movement in condition 2. During each behavioural test, baseline pain, expected pain and experienced pain were recorded. Furthermore, the peak torque and the variability of the produced muscle strength during the final behavioural test were assessed. Replicating and extending previous research, we found that patients overpredicted pain during a threatening behavioural test. Furthermore, pain-related fear and pain catastrophizing showed to be unique predictors of the peak torque of the final behavioural test. No support was found for our hypothesis that varied exposure facilitates generalization of exposure effects. Possible reasons for the failure to find an advantageous effect of varied-stimulus exposure and ideas for future research are discussed.     

Cognitive factors influence outcome following multidisciplinary chronic pain treatment: a replication and extension of a cross-lagged panel analysis

Reducing maladaptive cognitions is hypothesized to constitute an active therapeutic process in multidisciplinary pain programs featuring cognitive-behavioral interventions. A cross-lagged panel design was used to determine whether: a) early-treatment cognitive changes predicted late-treatment pain, interference, activity and mood changes, but not vice versa; b) three cognitive factors made unique contributions to outcome; c) substantial cognitive changes preceded substantial improvements in outcome. Sixty-five chronic pain patients, participating in a 4-week multidisciplinary program, completed measures of pain helplessness, catastrophizing, pain-related anxiety (process factors), pain severity, interference, activity level and depression (outcomes) at pre-, mid- and posttreatment. Results showed that early-treatment reductions in pain helplessness predicted late-treatment decreases in pain and interference, but not vice versa, and that early-treatment reductions in catastrophizing and pain-related anxiety predicted late-treatment improvements in pain severity, but not vice versa. Findings suggested that the three process factors predicted improvements mostly in common. However, little evidence was found that large early-treatment reductions in process variables preceded extensive improvements in pain. Findings replicate those of a recent report regarding cross-lagged effects, and offer support that cognitive changes may indeed influence late-treatment changes in outcomes.     

Anxiety and Depression: Evidence for the Differentiation of Commonly Cooccurring Constructs

Anxiety and depression frequently cooccur diagnostically. This observation has led researchers to investigate whether anxiety and depression can be meaningfully distinguished as unique theoretical constructs or whether they are better conceptualized as features of a general psychological distress. In the present study, we attempted to differentiate self-reported state and trait anxiety from depression in a university sample (N = 593) using the Beck Depression Inventory (BDI) and the Endler Multidimensional Anxiety Scales (EMAS). In addition, we examined the relationship among self-reported anxiety, depression, and neuroticism to determine the extent to which the Anxiety and Depression facet scales of the NEO Personality Inventory—Revised represent distinct and mutually exclusive measures of anxiety and depression. Principal-components analyses and a series of multiple regression models were used to conduct this investigation. Results indicate that both state and trait anxiety and depression can be reliably differentiated with the BDI and the EMAS. Results also suggest that invoking a single general distress factor to explain the strong interrelationships between anxiety and depression in nonclinical samples is premature.