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studies in humans

Is coffee consumption associated with a lower level of serum C-reactive protein? A meta-analysis of observational studies

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Pages 985-994 | Received 08 Nov 2017, Accepted 21 Jan 2018, Published online: 06 Feb 2018
 

Abstract

The association between coffee consumption and the level of C-reactive protein (CRP) has been evaluated in several epidemiological studies with conflicting results. This study aims to examine the relationship between coffee consumption and the serum CRP level. A comprehensive literature search up to August 2017, using PUBMED, EMBASE and Web of Science databases, was conducted to identify the relevant observational studies that examined the association between coffee consumption and the serum CRP level. A total of nine cross-sectional studies were included in this meta-analysis. According to the combined standard mean difference (SMD) between the highest and the lowest coffee intake category, coffee consumption was associated with a lower level of serum CRP level (SMD = −0.34, 95%CI: −0.62 to −0.06; p = .016). Subgroup analysis for CRP marker showed that coffee consumption was associated with a lower level of serum high-sensitivity CRP (hsCRP) (SMD = −0.51, 95%CI: −0.88 to −0.14; p = .007), but not standard CRP (SMD = 0.02, 95%CI: −0.28 to 0.32; p = .913). The existing evidence suggested that coffee consumption was associated with a lower level of serum CRP. More well-designed prospective cohort studies are needed to elaborate the concerned issues further.

Disclosure statement

The authors declare that they have no competing interests.

Additional information

Funding

This work was supported by the China Scholarship Council (student ID: 201706370196) and the Fundamental Research Funds for the Central Universities of Central South University (2017zzts233).

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