Pain
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Adolescents with chronic pain are at risk for impairment in their friendships. They miss out on leisure activities, have increased school absence, may have fewer friends, are at an increased risk for victimization, and may be perceived by peers as less likeable. To help determine the source of these problems, the Social Information Processing Model (SIP) was adapted using narrative vignettes to determine if adolescents with chronic pain interpret friendship interactions differently in terms of supportive and nonsupportive behaviors compared to healthy peers. ⋯ Adolescents with chronic pain may interpret nonsupportive social situations with close friends as more distressing. The endorsement of more supportive behaviors may indicate a need for, and expectation of, supportive behaviors from friends. When adolescents with chronic pain do not perceive friends as providing support, they may avoid these social situations.
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For reasons unknown, temporomandibular disorder (TMD) can manifest as localized pain or in conjunction with widespread pain. We evaluated relationships between cytokines and TMD without or with widespread palpation tenderness (TMD-WPT or TMD+WPT, respectively) at protein, transcription factory activity, and gene levels. Additionally, we evaluated the relationship between cytokines and intermediate phenotypes characteristic of TMD and WPT. ⋯ Interactions were observed between TGFβ1 and IL-8 SNPs: an additional copy of the TGFβ1 rs2241719 minor T allele was associated with twice the odds of TMD+WPT among individuals homozygous for the IL-8 rs4073 major A allele, and half the odds of TMD+WPT among individuals heterozygous for rs4073. These results demonstrate how pro- and antiinflammatory cytokines contribute to the pathophysiology of TMD and WPT in genetically susceptible people. Furthermore, they identify MCP-1, IL-1ra, IL-8, and TGFβ1 as potential diagnostic markers and therapeutic targets for pain in patients with TMD.
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Research has demonstrated that health care practitioners' adherence to guidelines for managing low back pain (LBP) remain suboptimal in recommending work absence, but specific beliefs about their role in maintaining patients at work have not been adequately researched. We examined private musculoskeletal practitioners' (chiropractors, osteopaths, and physiotherapists) beliefs and reported clinical behaviours in reference to patients' work. A cross-sectional postal questionnaire of 900 musculoskeletal practitioners included the Attitudes to Back pain in musculoskeletal practitioners questionnaires, reported frequency of four work-related behaviours, and a new measure of practitioners' work-related beliefs. ⋯ Our study confirms that, in contrast to current guidelines, many practitioners believe that LBP necessitates work absence. Overall, practitioners perceived their role in returning patients to work as limited, and believed that direct contact with employers was beyond their remit. In the UK, physiotherapists appear to be better placed to liaise with work in terms of both their beliefs and activities.
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We report the first nationwide survey of the impact of neuropathic pain, as opposed to nonneuropathic pain, on quality of life and health care utilization in the French general population. A postal questionnaire was sent to a representative sample of 4554 respondents from an initial nationwide survey of 30,155 subjects with or without chronic pain. It included pain characteristics (Neuropathic Pain Symptom Inventory, DN4), quality of life (Medical Outcomes Short Form 12, SF-12), sleep, anxiety/depressive symptoms (Hospital Anxiety and Depression Scale) and health care utilization. ⋯ They also made greater use of health care facilities, particularly as concerned neurological treatments and visits to neurologists (21% vs 9%; P<.01). Multivariate analyses showed that the neuropathic characteristics of pain made an independent contribution to quality-of-life impairment (P<.0001 and P=.0005 for the physical and mental scores of the SF-12 respectively). Our study indicates that the disease burden of chronic pain depends on the nature of the pain, independently of its intensity and duration.
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Even though psychological interventions are well established in the treatment of pediatric chronic pain, there is a clear need for further development, especially with severely disabled patients. However, optimizing effectiveness in psychological treatments for pain requires clarification of the mechanisms of action. Studies addressing change processes are scarce, however, particularly in relation to pediatric chronic pain. ⋯ Results illustrated that pain impairment beliefs and pain reactivity were the only variables that significantly mediated the differential effects of treatment on outcomes at follow-up. Also, these 2 mediators were shown to independently predict effects in outcome variables at follow-up while controlling for earlier effects in outcome, but only for the ACT condition. Although tentative, the pattern of results suggests that variables consistent with psychological flexibility mediate the effects of ACT-based interventions to improve functioning in patients with chronic debilitating pain.