Journal of behavioral medicine
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In recent years, several studies have pointed out the importance of pain-related fear in the development and maintenance of chronic pain. An important instrument for measuring pain-related fear in the context of low back pain is the Tampa Scale for Kinesiophobia (TSK). ⋯ For both groups the TSK-G appeared to consist of one, internally consistent, factor of 12 items. The one-factor TSK-G also appeared valid after comparison with scores on measures of catastrophizing and general health status.
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We conducted three studies to evaluate further the reliability and construct validity of a new self-report instrument, the Pain Distress Inventory (PDI; Osman et al., 2003, The Pain Distress Inventory: Development and initial psychometric properties, J. Clin. Psychol. 59: 767-785). ⋯ Ethnic and gender group differences were obtained on two of the PDI scale scores. Internal consistency reliability estimates on the PDI total and scale scores were good in both Studies I and II. In Study III, additional analyses of internal consistency and known-groups validity established strong support for construct validity of the PDI.
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Randomized Controlled Trial Comparative Study Clinical Trial
Self-efficacy and choice of coping strategies for tolerating acute pain.
Participants who reported either low or high self-efficacy for tolerating painful stimuli were randomly assigned to conditions, in which they either did or did not have a choice of strategies for coping with arm shock. Choice and self-efficacy were positively associated with increases in perceived control. ⋯ Providing a choice of strategies did not benefit those with low self-efficacy. This study demonstrates that the benefits of allowing individuals the opportunity of choosing among an array of coping options depend on a prior conviction that one is able to cope.
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Recent research has indicated that the Pain Catastrophizing Scale (PCS) is a reliable measure that taps three dimensions of a singular construct. Gender differences have been found consistently in catastrophizing, with women reporting significantly higher scores than men on the PCS. This study was designed to cross-validate the factor structure of the PCS, independently for men and women, through second-order confirmatory factor analysis. ⋯ The second research objective was to test the two models for gender equivalence. Results indicate that all constraints held across gender. Together, these findings support the psychometric soundness of the PCS and indicate that the gender differences found are not due to an inadequate fit of the measurement or structural model.
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Randomized Controlled Trial Clinical Trial
Parafunctional clenching, pain, and effort in temporomandibular disorders.
This study tested the hypotheses that (1) parafunctional clenching increases pain and can lead to a diagnosis of temporomandibular disorder (TMD) pain and (2) electromyographic (EMG) activity during parafunctional clenching is significantly and positively correlated with reports of pain. Fourteen individuals without TMD participated in 5 consecutive days of 20-min long EMG biofeedback training sessions of the left and right temporalis and masseter muscles. Subjects were randomly assigned to either a Decrease or Increase group and were instructed to maintain EMG activity below 2 microV or above 10 microV during training, respectively. ⋯ Masseter EMG activity was strongly correlated with pain. Parafunctional clenching increases pain and can lead to a diagnosis of TMD in otherwise pain-free individuals. Pain reports are positively correlated with the activity of the masseter muscle.