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Predicted relative risk of nonaccidental mortality by PM2.5 concentration (μg/m3) for the 1991, 1996, and 2001 CanCHEC cohorts. Predictions are (left column) unadjusted for either O3 or Ox, (center column) adjusted for O3, and (right column) adjusted for Ox. Mean predictions are displayed as solid blue lines with 95% CIs as grey-shaded areas. Green x-axis tick marks show RCS knot locations.
