Figure 14.
Predicted relative risk of nonaccidental mortality by PM2.5 concentration (μg/m3) for the Stacked CanCHEC cohort by number of knots used in the RCS fit [3–18 knots; Rows 1–4]. Mean predictions are displayed as solid blue lines with 95% CIs as grey-shaded areas. Green x-axis tick marks show RCS knot locations. The pink curve at 9 knots has the lowest BIC value. From left to right the last row of panels shows -2 log-likelihood values, AIC, BIC, and the highest concentration below which the RCS lower confidence limit is less than one.