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Meta-Analysis
. 2016 Dec 2:6:37488.
doi: 10.1038/srep37488.

An updated dose-response meta-analysis of coffee consumption and liver cancer risk

Chengbo Yu  1 , Qing Cao  1 , Ping Chen  1 , Shigui Yang  1 , Min Deng  1 , Yugang Wang  2 , Lanjuan Li  1
Affiliations
Meta-Analysis

An updated dose-response meta-analysis of coffee consumption and liver cancer risk

Chengbo Yu et al. Sci Rep. .

Abstract

Prospective cohort studies of the relationship between coffee consumption and liver cancer risk have drawn different conclusions. Therefore, a dose-response meta-analysis of prospective cohort studies was performed to disentangle this causal relationship. Prospective cohort studies of the association between coffee consumption and liver cancer risk published prior to Jan 9, 2016 were identified by searching in the PubMed and EMBASE databases. Extracted data were analyzed using a random-effects model. Of the 2892 records identified using the search strategy, a total of twenty cohort studies from ten publications were included in the final meta-analysis. The pooled estimate of relative risk (RR) with 95% confidence interval (CI) for highest vs. non/occasional coffee drinkers was 0.55(0.44-0.67). No evidence of publication bias was observed (p for Egger's test = 0.229). Sensitivity analysis indicated the results were robust. Dose-response analysis revealed a significant linear dose-response relationship between coffee consumption and liver cancer risk (p = 0.36). Subgroup analyses stratified by pre-specified variables (gender, geographic region, and adjusted factors) indicated similar results within individual subgroups. Our meta-analysis suggested that coffee consumption is inversely associated with liver cancer risk.

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Figures

Figure 1
Figure 1. Forest plot for study-specific and pooled RRs and 95% CIs of liver cancer for highest versus lowest categories of coffee consumption.
MHCC, hepatocellular carcinoma in men; WICC, intrahepatic cholangiocarcinoma in women; MICC, hepatocellular carcinoma in men.
Figure 2
Figure 2. Funnel plot of liver cancer for highest versus lowest categories of coffee consumption.
S.E. of logRR, Standard Error of logRR. The dashed lines represent the pseudo 95% CI. The sold line represents the effect estimate.
Figure 3
Figure 3. Dose-response relationships for the association between coffee consumption and liver cancer risk.
See this image and copyright information in PMC

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