Fig. 4

Variable selection results. Optimal models are based on a backward selection process using AIC/BIC. NPIs are colour coded based on their respective NPI categories. Cell-content represents corresponding p values: > 0.05—ns (i.e. non-significant); ≤ 0.05 and > 0.01—*; ≤ 0.01 and > 0.001—**; ≤ 0.001 —***.