Authors | Exhaled CO level (ppm) | N. Subjects | |
---|---|---|---|
 | Mean | Range or S.D. or 95% C.I. |  |
Chatkin J. et al. (2007) [3] | 4.30 | ± 2.5 | 152 |
Cunnington and Hormbrey (2002) [34] | 1.26 | 1.14-1.37 | 366 |
Deveci et al (2004) [27] | 3.61 | ± 2.15 | 55 |
Horvath et al. (2003) [32] | 3.00 | 0.5-5.0 | 37 |
Laranjeira R. at al (2000) [35] | 2.50 | 1.0 - 4.0 | 100 |
Montuschi et al. (2001) [9] | 3.00 | ± 0.3 | 10 |
Scharte et al. (2000) [36] | 1.55 | 1.2-1.7 | 6 |