Map of lung cancer OPR and SMR boundaries. The turquoise fill gradient indicates the OPR for lung cancer, with darker regions having higher OPR, and the gray lines define the census tract edges. Boundaries in lung cancer OPR are indicated in dark green, along with boundaries in male (orange) and female (yellow) lung cancer incidence. Boundaries in male and female lung cancer SMR do not overlap with one another to a significant extent. However, boundaries in both male and female lung cancer incidence do significantly overlap with OPR boundaries.