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Demographics of the participants
| Smokers | Healthy controls | |
|---|---|---|
| Number | 88 | 88 |
| Age | 32.3 ± 8.7 | 31.6 ± 8.0 |
| Gender | 44 M, 44 F | 44 M, 44 F |
| FTND | 5.4 ± 1.9 | -- |
| CPD | 19.8 ± 7.2 | -- |
| Smoking years | 14.0 ± 7.6 | -- |
| Lifetime usage | 13.7 ± 9.4 | -- |
FTND: Fagerström Test for Nicotine Dependence
CPD: cigarettes per day
Lifetime usage: measured in pack-years (= CPD × smoking years / 20)
M/F: male/female
Age, FTND, CPD, smoking years and lifetime usage are calculated in mean ± SD.
