Figure 2

Relative risk and 95% Confidence Interval (CI) estimates of residential environment and breast cancer incidence^§. The black squares and horizontal lines correspond to the study-specific relative risks and 95% confidence intervals. The area of the black squares is proportional to the inverse of the sum of the between-studies variance and the study-specific variance. The studies are organized by study design and then publication year. The diamond represents the pooled relative risk and the 95% confidence interval. ^§Estimates were re-calculated by changing the reference category for the following studies: Income (Borugian [27]); Poverty (Gorey [30], Prehn [39]); Composite SES (Shack [44], Spadea [45]); Urbanization (Clegg [28], Schlichting [43]).