Table 2 Effects of the two different types of cigarette
Overall population | Smokers vs. non smokers | |||||
|---|---|---|---|---|---|---|
Effect | 95 % CI | P | Effect | 95 % CI | P | |
FeCO (ppm) | ||||||
Traditional | 4.3 | (2.3 to 6.2) | <0.001 | 2.9 | (−0.9 to 6.7) | 0.127 |
Electronic | −0.2 | (−0.8 to 0.4) | 0.486 | −0.6 | (−1.8 to 0.6) | 0.301 |
P value | <0.001 | 0.067 | ||||
FeNO (ppb) | ||||||
Traditional | −0.6 | (−1.6 to 0.4) | 0.219 | 1.4 | (−0.6 to 3.4) | 0.155 |
Electronic | −0.2 | (−0.8 to 0.4) | 0.512 | 0.8 | (−0.5 to 2.1) | 0.198 |
P value | 0.372 | 0.501 | ||||
FEV1 (%) | ||||||
Traditional | −3.4 | (−5.9 to −0.8) | 0.013 | −1.0 | (−6.1 to 4.1) | 0.691 |
Electronic | −1.7 | (−4.8 to 2.9) | 0.070 | −2.1 | (−5.7 to 1.6) | 0.250 |
P value | 0.098 | 0.575 | ||||
FVC (%) | ||||||
Traditional | −1.6 | (−5.7 to 2.6) | 0.437 | −3.9 | (−12.2 to 4.4) | 0.331 |
Electronic | −1.0 | (−4.8 to 2.9) | 0.602 | −2.2 | (−9.8 to 5.4) | 0.543 |
P value | 0.584 | 0.448 | ||||
FEV1/FVC | ||||||
Traditional | −1.9 | (−3.9 to 0.1) | 0.065 | 2.0 | (−2.0 to 6.1) | 0.304 |
Electronic | −0.9 | (−2.5 to 0.6) | 0.226 | −0.1 | (−9.8 to 3.0) | 0.926 |
P value | 0.182 | 0.132 | ||||
PEF (%) | ||||||
Traditional | −6.5 | (−11.7 to −1.3) | 0.017 | −7.5 | (−17.8 to 2.9) | 0.148 |
Electronic | −3.8 | (−9.2 to 1.6) | 0.155 | −6.0 | (−16.8 to 4.8) | 0.254 |
P value | 0.145 | 0.692 | ||||
FEF25 (%) | ||||||
Traditional | −5.8 | (−10.9 to −0.6) | 0.030 | .4.1 | (−14.1 to 6.2) | 0.412 |
Electronic | −3.7 | (−7.6 to 0.3) | 0.066 | −7.1 | (−15.0 to 0.7) | 0.073 |
P value | 0.252 | 0.414 | ||||
FEF50 (%) | ||||||
Traditional | −5.0 | (−9.5 to −0.4) | 0.033 | 2.1 | (−6.9 to 11.1) | 0.629 |
Electronic | −2.9 | (−6.8 to 1.1) | 0.143 | −2.9 | (−10.8 to 5.0) | 0.447 |
P value | 0.161 | 0.096 | ||||
FEF75 (%) | ||||||
Traditional | −6.1 | (−11.9 to −0.3) | 0.040 | 9.3 | (−2.3 to 20.9) | 0.107 |
Electronic | −4.8 | (−11.2 to 1.6) | 0.132 | 3.6 | (−16.4 to 9.3) | 0.562 |
P value | 0.657 | 0.037 | ||||