Table 2.
Deaths of or with dementia versus matched controls: relation with smoking status as last recorded at least 10 years earlier
| Category of dementia | No of cases (controls)
|
Relative risk (95% CI) | |
|---|---|---|---|
| Continuing smokers | Not continuing* | ||
| Dementia probably or definitely due to Alzheimer's disease | 147 (591) | 223 (889) | 0.99 (0.78 to 1.25) |
| Specified as Alzheimer's disease | 30 (136) | 65 (244) | 0.83 (0.51 to 1.33) |
| Probable Alzheimer's disease | 117 (455) | 158 (645) | 1.05 (0.80 to 1.37) |
| Other dementia | 43 (187) | 60 (225) | 0.86 (0.55 to 1.34) |
| Vascular dementia | 41 (180) | 56 (208) | 0.84 (0.53 to 1.33) |
| Lewy body dementia | 2 (7) | 4 (17) | 1.22 (0.17 to 8.69) |
| Any dementia | 190 (778) | 283 (1114) | 0.96 (0.78 to 1.18) |
| Dementia as underlying cause | 92 (392) | 177 (684) | 0.91 (0.69 to 1.20) |
| Dementia as associated condition | 98 (386) | 106 (430) | 1.03 (0.75 to 1.41) |
*
Lifelong non-smokers and long term ex-smokers (for whom mean time since they stopped smoking was 34 years).