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Table 2.

Geometric mean and geometric standard deviation values for urinary 2-NAP and 1-OHP levels (μmol/mol creatinine) stratified by exposure to wood smoke and smoking

Exposure category2-NAP
1-OHP
NGM (GSD) (μmol/mol creatinine)NGM (GSD) (μmol/mol creatinine)
All 253 4.01 (1.55) 250 0.07 (1.14) 
Wood smoke     
    Nonexposed 67 1.35 (1.33)* 66 0.03 (1.32) 
    Low 86 4.51 (1.23) 84 0.06 (1.19) 
    High 100 7.17 (1.24) 100 0.13 (1.15) 
Cigarette     
    Nonsmokers 126 2.80 (1.24)* 124 0.04 (1.28)* 
    Smokers 116 5.17 (1.22) 115 0.08 (1.23) 
Nonexposed and nonsmokers 43 0.91 (1.31) 43 0.01 (1.34) 
Exposure category2-NAP
1-OHP
NGM (GSD) (μmol/mol creatinine)NGM (GSD) (μmol/mol creatinine)
All 253 4.01 (1.55) 250 0.07 (1.14) 
Wood smoke     
    Nonexposed 67 1.35 (1.33)* 66 0.03 (1.32) 
    Low 86 4.51 (1.23) 84 0.06 (1.19) 
    High 100 7.17 (1.24) 100 0.13 (1.15) 
Cigarette     
    Nonsmokers 126 2.80 (1.24)* 124 0.04 (1.28)* 
    Smokers 116 5.17 (1.22) 115 0.08 (1.23) 
Nonexposed and nonsmokers 43 0.91 (1.31) 43 0.01 (1.34) 
*

P < 0.05 for difference among means.

P = 0.07 for difference among means.

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