Table 3. Observations on follow up, and calculated survival rates and life expectancies.
| Person-years of follow up |
No. of deaths | Age by which half of the population died from age of 40 years |
Life expectancy at age of 40 years (95% confidence interval) |
|
| Male | ||||
| Smokers | 717,200 | 9,240 | 80.4 | 38.5 (38.3, 38.7) |
| Ex-smokers | 328,883 | 4,582 | 82.4 | 40.8 (40.6, 41.0) |
| Never-smokers | 278,921 | 2,460 | 84.6 | 42.4 (42.2, 42.7) |
| Total | 1,325,004 | 16,282 | 81.8 | 39.9 (39.8, 40.0) |
| (subgroups) | ||||
| Smokers, 1-14 cigarettes a day | 117,742 | 2,224 | 80.1 | 38.3 (37.8, 38.7) |
| Smokers, 15-24 cigarettes a day | 357,916 | 4,762 | 80.6 | 38.7 (38.4, 38.9) |
| Smokers, 25+ cigarettes a day | 230,170 | 2,111 | 79.8 | 37.9 (37.4, 38.4) |
| Ex-smokers, quit at age <40 years | 100,155 | 474 | 86.1 | 43.3 (42.6 43.9) |
| Ex-smokers, quit at age 40-49 years | 97,328 | 739 | 84.9 | 42.2 (41.7, 42.7) |
| Ex-smokers, quit at age 50-59 years | 74,227 | 1,300 | 82.4 | 40.1 (39.6, 40.6) |
| Ex-smokers, quit at age 60-69 years | 34,117 | 1,201 | 81.1 | 39.0 (38.3, 39.6) |
| Female | ||||
| Smokers | 117,172 | 1,085 | 84.4 | 42.5 (42.1, 43.0) |
| Ex-smokers | 33,517 | 409 | 85.0 | 42.8 (42.1, 43.5) |
| Never-smokers | 1,379,703 | 7,924 | 88.4 | 46.1 (46.0, 46.3) |
| Total | 1,530,392 | 9,418 | 88.0 | 45.7 (45.6, 45.9) |
| (subgroups) | ||||
| Smokers, 1-14 cigarettes a day | 58,029 | 609 | 84.5 | 42.5 (41.9, 43.2) |
| Smokers, 15-24 cigarettes a day | 45,497 | 366 | 84.0 | 42.3 (41.5, 43.0) |
| Smokers, 25+ cigarettes a day | 9,570 | 79 | 81.9 | 40.4 (38.3, 42.4) |
| Ex-smokers, quit at age <40 years | 8,923 | 28 | 85.0 | 43.5 (41.2, 45.9) |
| Ex-smokers, quit at age 40-49 years | 8,027 | 52 | 89.0 | 43.9 (41.7, 46.0) |
| Ex-smokers, quit at age 50-59 years | 7,966 | 94 | 86.5 | 43.9 (42.6, 45.3) |
| Ex-smokers, quit at age 60-69 years | 3,966 | 106 | 84.9 | 42.0 (41.0, 43.0) |