Secondhand Smoke Decreases with Age
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% with serum cotinine ≥0.05 ng/mL
1
3-11
12-19
20-39
40-59
60 and over
0
10
20
30
40
50
60
1
3-11
53.6
12-19
46.5
20-39
42.8
40-59
35.4
60 and over
31.6
% with serum cotinine ≥0.05 ng/mL
Sources:
cdc.gov
