From: A pilot study with early adolescents: dealing with diet, tobacco and air pollution using practical experiences and biological markers
Exhaled CO
T1
T2
Total sample (N = 258)
0.86 (SD 1.73)
0.68 (SD 1.91)
Current smokers (N = 43)
3.09 (SD 1.36)
3.92 (SD 1.52)