Psychological Processes Underlying the Development of a Chronic Pain Problem: A Prospective Study of the Relationship Between Profiles of Psychological Variables in the Fear-Avoidance Model and Disability


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Abstract

Objectives:Understanding the psychological processes that underlie the development of a chronic pain problem is important to improve prevention and treatment. The aim of this study was to test whether distinct profiles of variables within the fear-avoidance model could be identified and could be related to disability in a meaningful way.Methods:In 81 persons with a musculoskeletal pain problem, cluster analysis was used to identify subgroups with similar patterns on fear and avoidance beliefs, catastrophizing, and depression. The clusters were examined cross-sectionally and prospectively on function, pain, health care usage, and sick leave.Results:Five distinct profiles were found: pain-related fear, pain-related fear + depressed mood, medium pain-related fear, depressed mood, and low risk. These subgroups were clearly related to outcome. In contrast to the clusters “medium pain-related fear” and “low risk,” the majority of those classified in the clusters “pain-related fear,” “pain-related fear + depressed mood,” and “depressed mood” reported long-term sick leave during follow-up. The subjects in the clusters with high scores on the depression measure reported the highest percentage of health care usage during follow-up (70% in the “pain-related fear + depressed mood” group and 42% in the “depressed mood” group reported >10 health care visits).Conclusions:Distinct profiles of psychological functioning could be extracted and meaningfully related to future disability. These profiles give support to the fear-avoidance model and underscore the need to address the psychological aspects of the pain experience early on.

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