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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: J Allergy Clin Immunol Pract. 2019 May 28;7(8):2653–2660.e3. doi: 10.1016/j.jaip.2019.05.029

Figure 2.

Figure 2.

((A) and (B)) Boxplots of lung function measures for quartiles of serum cadmium and quartiles of serum lead in all adult participants. (A) Fitted lung function measures for quartiles of serum cadmium, (B) Fitted lung function measures for quartiles of serum lead. All models were adjusted for annual household income, body mass index, current wheeze status, serum cotinine, occupational exposure to mineral dust or exhaust fumes, use of oral or inhaled steroid in the past 2 days, and smoking status. Q1, the first quartile (lowest); Q2, the second quartile; Q3, the third quartile; Q4, the fourth quartile (highest). The widths of the boxes are proportional to the sample size in every quartile. * P< 0.05 and ** P< 0.01 for comparison with the first quartile (Q1).