Figure 6.

Summary RRs of hepatocellular cancer for high coffee drinkers versus non/lowest drinkers from included studies. Squares represent study-specific relative risk estimates (size of the square reflects the study-specific statistical weight, that is, the inverse of the variance); horizontal lines represent 95% CIs; diamonds represent summary relative risk estimates with corresponding 95% CIs.

Yu et al. BMC Cancer 2011 11:96   doi:10.1186/1471-2407-11-96
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