Smoking habits | PCPhs (%, means ± SD) | PCNs (%, means ± SD | P |
---|---|---|---|
Smoking status | |||
Current | 34.4 % | 30.7 % | |
Former | 14.0 % | 10.1 % | <0.001 |
Non-smoker | 51.5 % | 59.3 % | |
Duration of smoking (year) | 14.6 ± 7.2 | 12.1 ± 6.2 | <0.001 |
Age of smoking initiation (year) | 21.7 ± 5.1 | 20.6 ± 4.3 | 0.086 |
Age of smoking cessation (year) | 34.2 ± 6.5 | 29.3 ± 6.2 | <0.001 |
Amount of cigarette a day (unit) | 19.2 ± 6.6 | 14.8 ± 8.9 | <0.001 |
FNDT | 3.7 ± 2.7 | 3.4 ± 2.2 | 0.251 |