r/Health – Poverty is “consistently and reliably” associated with inflammation in childhood, finds a new study based on meta-analysis, providing evidence that lower childhood socioeconomic status was associated with higher levels of chronic inflammation.

Journal Reference:

Izabela Milaniak, Sara R. Jaffee,

Childhood socioeconomic status and inflammation: A systematic review and meta-analysis,

Brain, Behavior, and Immunity, 2019, ISSN 0889-1591,

DOI: https://doi.org/10.1016/j.bbi.2019.01.018.

Link: http://www.sciencedirect.com/science/article/pii/S0889159119300753


Recent research suggests that risk for chronic diseases of aging including cardiovascular disease, diabetes, and even cancer can be programmed early in the lifespan as a result of exposure to chronic stressors like low socioeconomic status (SES) that are hypothesized to promote a pro-inflammatory response in immune cells that results in chronic, systemic inflammation. The present paper conducted a meta-analysis to establish whether exposure to low (versus higher) SES in childhood and adolescence is associated with higher levels of inflammation (as measured by C-reactive protein, IL-6, and fibrinogen) concurrently and in adulthood. We conducted meta-analyses with both unadjusted bivariate associations between SES and inflammation and with adjusted associations that controlled for a range of covariates including demographic factors, body mass index, smoking, physical activity and current SES. A systematic review of Pubmed and PsycINFO identified a total 35 studies (26 with unadjusted and 31 adjusted effect sizes) to be included in the meta-analysis. Random-effects meta-analysis showed that individuals who were exposed to low SES in childhood and adolescence had significantly higher levels of inflammatory markers (r = −0.07, p < .001, 95% CI = −0.09, −0.05). This association remained significant in adjusted analyses (r = −0.06, p < .001, 95% CI = −0.09, −0.03). However, the relationship between childhood SES and inflammation was non-significant in a meta-analysis with longitudinal studies that all controlled for adulthood SES (r = −0.03, p = .356, 95% CI = −0.08, 0.03). Future longitudinal research should utilize measurement of inflammatory markers at multiple time points to further examine the complex relationships between SES and health both in childhood and adulthood.

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