Table 2.
Demographics of the respondents
| Demographic characteristic | All MRC CFAS (Number = 451) | Cambridgeshire and Nottingham cohorts (Number = 208) | NFT only (Number = 43) | AS + NFT (Number = 32) | AS only (Number= 52) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Sex | ||||||||||
| Men | 188 | (41) | 123 | (59) | 10 | (23) | 16 | (50) | 21 | (40) |
| Women | 268 | (59) | 85 | (41) | 33 | (74) | 16 | (50) | 31 | (60) |
| Age at death | ||||||||||
| 70 to 79 | 89 | (19) | 40 | (19) | 5 | (12) | 4 | (12) | 15 | (29) |
| 80 to 89 | 204 | (49) | 102 | (49) | 19 | (44) | 16 | (50) | 28 | (54) |
| 90 to 105 | 163 | (32) | 66 | (32) | 19 | (44) | 12 | (48) | 9 | (17) |
| Education | ||||||||||
| <10 years | 318 | (69) | 159 | (76) | 33 | (77) | 26 | (81) | 35 | (67) |
| 10+ years | 138 | (31) | 49 | (24) | 10 | (23) | 6 | (19) | 17 | (33) |
| Social class | ||||||||||
| Non manual | 165 | (36) | 79 | (38) | 17 | (39) | 12 | (37) | 17 | (33) |
| Manual | 234 | (51) | 110 | (33) | 21 | (49) | 16 | (50) | 30 | (58) |
| Unclassified/Army | 57 | (13) | 19 | (9) | 5 | (12) | 4 | (13) | 5 | (9) |
| Dementia statusa | ||||||||||
| Dementia | 242 | (53) | 105 | (50) | 30 | (70) | 24 | (75) | 18 | (34) |
| No dementia | 184 | (40) | 83 | (40) | 12 | (28) | 6 | (19) | 27 | (53) |
| Unknownb | 30 | (7) | 20 | (10) | 1 | (2) | 2 | (6) | 7 | (13) |
aDetermined using AGECAT organicity scores, informants interview items and death certificates; bunknown dementia status was assigned on the basis that both the time between the last interview and death was too long to exclude incident dementia (over six months) and the data collected from interviews were inconclusive. AS, alpha-synucleinopathy; MRC CFAS, Medical Research Council Cognitive Function and Ageing Study; NFT, neurofibrillary tangles.