Figure 2From: Cigarette smoking, cadmium exposure, and zinc intake on obstructive lung disorderLog-odds of obstructive lung disorder versus the ratio of Zn to Cd (log-transformed) (adjusted for age, body mass index, gender, race/ethnicity, and smoking status). Dotted lines: twice-standard-error; rug plot on the x-axis describing the distribution of the ratio of Zn to Cd (log-transformed).Back to article page