Unemployment and ill health: A connection through inflammation?

Abstract

Background: Unemployment is a source of acute and long-term psychosocial stress. Acute and chronic psychosocial stress can induce pronounced changes in human immune responses. In this study we tested our hypothesis that stress-induced low-grade tissue inflammation is more prevalent among the unemployed. Methods: We determined the inflammatory status of 225 general population subjects below the general retirement age (65 years in Finland). Those who had levels of both interleukin-6 ( 0.97 pg/mL) and high-sensitivity C-reactive protein ( ≥ 1.49 mg/L) above the median were assessed to have an elevated inflammatory status (n = 72). Results: An elevated inflammatory status was more common among the unemployed than among other study participants (59% versus 30%, p = 0.011). In the final multivariate model, those who were unemployed had over five-fold greater odds for having an elevated inflammatory status (OR 5.20, 95% CI 1.55-17.43, p = 0.008). Conclusion: This preliminary finding suggests that stress-induced low-grade inflammation might be a link between unemployment and ill health. © 2009 Hintikka et al; licensee BioMed Central Ltd.