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. 2018 Sep 12;2(3):e020. doi: 10.1097/EE9.0000000000000020

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Figure 3. — Land use regression models for annual mean Fe (% mass) (A: Model R² = 0.72; Cross-validation R² = 0.68), Cu (% mass) (B: Model R² = 0.81; Cross-validation R² = 0.79), and their estimated impact on ROS (C: Model R² = 0.71; Cross-validation R² = 0.65) in Toronto, Canada. Dots and shaded lines reflect point estimates and 95% confidence intervals.