Couple congruence on ratings of pain severity and disability were examined using hierarchical linear modeling. Older community Individuals with Chronic Pain (ICPs) and their spouses completed the Multidimensional Pain Inventory (pain severity, interference, negative spouse responses to pain), Sickness Impact Profile (physical disability, psychosocial disability), and the Mood and Anxiety Symptom Questionnaire (psychological distress). Both spouses reported on ICPs' pain and disability as well as their own psychological distress. Spousal incongruence was observed on interference and physical disability such that ICPs reported greater disability than their spouses reported for them. No significant incongruence was observed in pain severity or psychosocial disability. Predictors of couples' mean ratings of pain and disability were identified. Specifically, couples in which the ICP was female reported higher couples' ratings of pain severity and interference. ICP distress was related to higher couples' ratings of all pain and disability variables whereas spouse distress was related to higher psychosocial disability ratings. ICPs' perceptions of negative spouse responses were also positively associated with couples' ratings of physical and psychosocial disability. In terms of congruence, ICP distress was associated with incongruence on interference, physical disability, and psychosocial disability whereas spouse distress predicted incongruence on pain severity, and interference. This study suggests that understanding couples' pain outcome ratings involves an awareness of factors that might influence their perceptions and behaviors.
Researchers have hypothesized that pain catastrophizing has a social function. Although work has focused on the catastrophizing of individuals with chronic pain (ICPs), little is known about the pain catastrophizing of their significant others. The purpose of this study was to test the validity of a revised version of the original PCS [Sullivan MJL, Bishop S, Pivik J. The pain catastrophizing scale: development and validation. Psychol Assess 1995; 7: 432-524.] in which individuals were instructed to report on their own catastrophizing about their significant other's pain. In Study 1, a confirmatory factor analysis was conducted to determine the factor structure of the PCS-Significant Other (PCS-S) in a diverse sample of university undergraduates (n=264). An oblique second-order 3-factor model with two cross-loadings provided the best fit and this model was invariant across gender and racial groups. This factor structure was cross-validated in Study 2 with a second sample of university undergraduates (n=213). Results indicated that the 3-factor structure with two cross-loadings was a viable model of significant others' pain catastrophizing across gender and racial groups. In Study 3, this factor structure was replicated and the content validity of the PCS-S was examined in a sample of adult ICPs and their spouses (n=111). Spouse catastrophizing was related to ICP pain severity and interference as well as both spouses' depressive symptoms. In addition, ICPs were at a greater risk for psychological distress when both spouses had higher levels of catastrophizing. The PCS-S has the potential to be a useful and valid measure of pain catastrophizing in the significant others of ICPs.
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