Cost of illness and illness perceptions in patients with fibromyalgia.

OBJECTIVES: The disease impact and economic burden of fibromyalgia (FM) are high for patients and society at large. Knowing potential determinants of economic costs may help in reducing this burden. Cognitive appraisals (perceptions) of the illness could affect costs. The present study estimated costs of illness in FM and examined the association between these costs and illness perceptions. METHODS: Questionnaire data of FM severity (FIQ), illness perceptions (IPQ-R-FM), productivity losses (SF-HLQ) and health care use were collected in a cohort of patients with FM. Costs were calculated and dichotomised (median split). Univariate and hierarchic logistic regression models examined the unique association of each illness perception with 1) health care costs and 2) costs of productivity losses. Covariates were FM severity, comorbidity and other illness perceptions. RESULTS: 280 patients participated: 95% female, mean age 42 (SD=12) years. Annualised costs of FM per patient were €2944 for health care, and €5731 for productivity losses. In multivariate analyses, a higher disease impact (FIQ) and two of seven illness perceptions (IPQ-R-FM) were associated with high health care costs: 1) high scores on 'cyclical timeline' reflecting a fluctuating, unpredictable course and 2) low scores on 'emotional representations', thus not perceiving a connection between fibromyalgia and emotions. None of the variables was associated with productivity losses. CONCLUSIONS: Our study indicates that perceiving a fluctuating course and low emotional representation, which perhaps reflects somatic fixation, are associated with health care costs in FM. Future studies should examine whether targeting these illness perceptions results in reduction of costs.

Tailored cognitive-behavioral therapy and exercise training for high-risk patients with fibromyalgia.

OBJECTIVE: The treatment of patients with fibromyalgia (FM), a high-prevalence chronic pain condition with a high impact on both patients and society, poses a great challenge to clinicians due to a lack of effective treatments. In view of the large individual variability in outcome, selecting patients at risk of long-term dysfunction and offering tailored treatment may be promising for beneficial treatment effects. METHODS: High-risk patients were selected and classified into 2 groups (pain-persistence and pain-avoidance groups) and subsequently randomized in groups to either a treatment condition (TC) or a waiting list control condition (WLC). Treatment consisted of 16 sessions of cognitive-behavioral therapy (CBT) and exercise training in groups, tailored to the patient's specific cognitive-behavioral pattern, delivered within 10 weeks. Physical and psychological functioning and impact of FM were assessed at baseline, posttreatment, and 6-month followup. Treatment effects were evaluated using a linear mixed model. RESULTS: The treatment effects were significant for all primary outcomes, showing significant differences in physical (pain, fatigue, and functional disability) and psychological (negative mood and anxiety) functioning, and impact of FM for the TC in comparison with the WLC. Effect sizes in the TC were overall large, and reliable change indices indicated a clinically relevant improvement among the TC. CONCLUSION: The presented results demonstrate for the first time that tailored CBT and exercise training for high-risk patients with FM is effective in improving short- and long-term physical and psychological functioning, indicating that tailoring treatment is likely to promote beneficial outcomes in FM and reduce the burden for patients and society.