Inflammatory Mediators and Pain in the First Year After Acute Episode of Low-Back Pain in Elderly Women: Longitudinal Data from Back Complaints in the Elders-Brazil.

Objective: The aims of this study were to determine the course of plasma levels of inflammatory mediators (interleukin 6 [IL-6], tumor necrosis factor [alpha] [TNF-[alpha]], soluble TNF receptor 1 [sTNF-R1]) and the severity of low-back pain (LBP) over 6 to 12 months after an acute episode of LBP in elderly women and to establish an association between inflammatory mediators and LBP recovery. Design: This was a longitudinal study of a subsample (155 elderly women with acute LBP, aged >=65 years) of the international Back Complaints in the Elders cohort study. Plasma levels of IL-6, TNF-[alpha], and sTNF-R1 were measured using enzyme-linked immunosorbent assays and pain severity using the numerical pain scale. Results: There was a decrease in the severity of LBP (P = 0.033) and in the levels of IL-6 and TNF-[alpha] (P

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