The Clinical journal of pain
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Sleep disturbance and chronic pain are related. The present study evaluated both direct and indirect (mediated) pathways through which sleep disturbance might be related to chronic pain intensity and function. ⋯ Sleep disturbance was related significantly with chronic pain intensity and function by both direct and indirect pathways. These results are consistent with an emerging literature highlighting the potential significance of sleep disturbance in chronic pain patients, and provide further support for addressing sleep disturbance in the assessment and management of chronic pain.
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Widespread pain is important for the diagnosis of fibromyalgia (FM). For this purpose, the sum of pain regions obtained from a topographical distribution has been used to compute a Widespread Pain Index (WPI), but there is no empirical basis for choosing the regions. The aim of this study was to find an empirical distribution of the pain regions. ⋯ WPIE has a normal distribution and shows better predictive qualities than WPIR. The emotional factor is conceptualized as emotional because of the relative importance of the right hemisphere in negative emotions and pain. The physical factor could be responsible for the decreased ability to coordinate left-right stepping.
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The present study aimed to: (1) better understand physical activity levels in youth with chronic abdominal pain and (2) investigate the relationship between day-level physical activity related to next day pain intensity to identify any intraindividual heterogeneity. ⋯ The current study highlights the importance of separating between-person and within-person differences when examining the relationship between physical activity and pain severity. Future studies should explore moderating factors that may help to explain random effects to better understand the types of individuals with positive or negative relationships between physical activity and pain severity.
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Chronic postsurgical knee pain (CPSP) is a burden for ∼20% of the patients following total knee replacement (TKR). Presurgical pain intensities have consistently been found associated with CPSP, and it is suggested that comorbidities are likewise important for the development of CPSP. This study aimed to identify presurgical risk factors for the development of CPSP 5 years after TKR on the basis of medical records containing information with regard to comorbidities. ⋯ The current study found that a variety of presurgical clinical factors can correctly classify 33.6% of patients at risk for developing CPSP 5 years following TKR.
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Coprevalence of chronic pain and posttraumatic stress disorder (PTSD) negatively impacts the course of both disorders. Patients diagnosed with both conditions report greater pain, affective distress, and disability when compared with those with either chronic pain or PTSD alone. While the prevalence and complexity of the comorbidity is widely acknowledged, there is a dearth of research examining potential mechanism variables that might account for the relationship between chronic pain and PTSD. The current study utilizes a series of mediation analyses to examine if pain catastrophizing mediates the relationship between PTSD symptomatology and chronic pain outcome. ⋯ Results suggest that pain catastrophizing may represent an important cognitive mechanism through which PTSD symptoms influence the experience of chronic pain. Psychosocial treatment approaches that directly target tendency to catastrophize in response to pain may hold the potential to have salutary effects on both chronic pain and PTSD.