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

Citation

Milaniak, Izabela & Jaffee, Sara R. (2019). Childhood socioeconomic status and inflammation: A systematic review and meta-analysis. Brain, Behavior, and Immunity.

Abstract

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.

URL

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

Keyword(s)

Meta-analysis

Reference Type

Journal Article

Journal Title

Brain, Behavior, and Immunity

Author(s)

Milaniak, Izabela
Jaffee, Sara R.

Year Published

2019

Edition

February 7, 2019

DOI

10.1016/j.bbi.2019.01.018

Reference ID

7386