FIGURE 4.

Random-effects model meta-analysis of the associations between each cup (236.6 mL) increment of black or green tea consumption per day and risks of stroke event outcome. Column headings indicate the following: adequate follow-up, adequacy of follow-up of cohorts; comparability, comparability of cohorts on the basis of the design or analysis; exposure, ascertainment of exposure; and no outcome at start, demonstration that outcome of interest was not present at start of study. See Supplemental Table 1 for details of risk-of-bias assessment questions depicted in the right columns of the forest plot. The size of the boxes represents the weight of the study in the random-effects meta-analysis.