[Attachment style and cytokine levels in patients with fibromyalgia. A prospective longitudinal study].

BACKGROUND AND OBJECTIVES: The association between attachment style and subjective pain is controversially discussed and the influence of attachment styles on cytokine levels in chronic pain has received little attention in research. In this prospective longitudinal clinical study, we evaluated the relationship between cytokines, attachment style and subjective pain intensity as well as pain-related functioning in patients with fibromyalgia (FM) who underwent a 4-week multidisciplinary pain therapy.

MATERIALS AND METHODS: The attachment style was determined in 43 patients with FM using the relationship questionnaire (RQ-2) and subjective pain with the German version of the West Haven-Yale multidimensional pain inventory. Serum levels of the proinflammatory cytokines tumor necrosis factor alpha (TNF-α) and interleukin 8 (IL-8) and the anti-inflammatory cytokines IL-4 and IL-10 were assessed before and after treatment and additionally once only in 18 healthy controls (Bio-Plex system).

RESULTS: Patients with FM syndrome were significantly more often insecurely attached than healthy controls (p = 0.001). Serum levels of TNF-α (p = 0.001) and IL-10 (p = 0.039) were significantly higher in FM patients compared to controls. Attachment was unrelated to IL-4, IL-8, and IL-10 levels. Insecurely attached FM patients had significantly higher levels of TNF-α (p = 0.002). than securely attached patients. Insecurely and securely attached patients did not differ in subjective levels of pain severity, activity or functional interference. Cytokine levels were not correlated with subjective levels of pain severity or functional interference. Multidisciplinary pain therapy significantly reduced cytokine levels, pain severity, anxiety and depression independent of attachment style.