Figure 2.

Forest plot quantifying the association between physical activity and bladder cancer risk by domain of physical activity, including summary risk estimates, I² values, and P-value for difference by physical activity domain. The meta-analysis included 20 bladder cancer risk estimates comparing high vs low levels of physical activity. The P-value for difference was estimated from random effects meta-regression comparing a model that included the stratification variable with the null model that did not include the stratification variable.