Fig. 5
The annual ratio of lung cancer mortality to all natural mortality (the crude lung cancer mortality ratio) within high and low vulnerability areas plotted from 1998–2013 for each predictive map based on eight threshold values. The columns show the threshold values in Bq m−3, which were used to delineate low and high vulnerability. The rows show the total trends, and the trends when stratified by higher smoking LHAs and lower smoking LHAs. The lung cancer mortality trends were fitted with a locally-weighted LOESS smoother