Prevalence(gambling) odds that a lower or higher % forced expiratory volume in 1 s/forced vital capacity is from a current-smoker and not a never-smoker
| % below or above predicted mean | Third decade age 20–29 yrs | Fourth decade age 30–39 yrs | Fifth decade age 40–49 yrs | Sixth decade age 50–59 yrs | Seventh decade age 60–69 yrs | Eighth decade age 60–69 yrs | All decades mean | All decades sd |
| ≤-14 | 4.2 | 4.6 | 12.3 | 45.3 | 92.5 | 77.1 | 39.3 | 38.6 |
| -12 | 2.3 | 6.0 | 1.7 | 9.7 | 3.5 | 2.9 | 4.4 | 3.0 |
| -10 | 1.3 | 4.1 | 1.4 | 7.5 | 3.8 | 0.7 | 3.1 | 2.6 |
| -8 | 1.8 | 1.5 | 3.3 | 1.5 | 1.3 | 1.8 | 1.9 | 0.7 |
| -6 | 1.4 | 1.7 | 2.0 | 2.0 | 1.4 | 0.7 | 1.5 | 0.5 |
| -4 | 1.2 | 1.0 | 1.5 | 1.3 | 0.5 | 1.4 | 1.2 | 0.4 |
| -2 | 1.4 | 1.2 | 1.0 | 0.5 | 1.6 | 0.8 | 1.1 | 0.4 |
| 0 | 0.6 | 0.7 | 0.7 | 0.6 | 0.3 | 0.5 | 0.6 | 0.2 |
| 2 | 0.7 | 0.7 | 0.6 | 0.4 | 0.1 | 0.4 | 0.5 | 0.2 |
| 4 | 0.7 | 0.7 | 0.4 | 0.6 | 0.3 | 0.3 | 0.5 | 0.2 |
| 6 | 0.5 | 0.6 | 0.3 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 |
| ≥8 | 0.5 | 0.2 | 0.4 | 0.1 | 0.4 | 0.4 | 0.3 | 0.2 |
| If ≤-8 | 2.1 | 2.9 | 2.8 | 5.4 | 4.3 | 4.1 | 3.6 | 1.2 |
| If ≤-6 | 1.8 | 2.4 | 2.6 | 4.0 | 3.0 | 2.8 | 2.8 | 0.7 |
| If ≤-4 | 1.7 | 1.7 | 2.2 | 3.0 | 2.1 | 2.3 | 2.2 | 1.5 |