TABLE 1.
Participants’ characteristics
| Overall sample N = 2261 | Subsample MRI n = 1523 | Subsample 18F‐FDG‐PET n = 740 | ||
|---|---|---|---|---|
| Age (mean, SD) | 70.8 (8.7) | 70.5 (8.3) | 71.1 (8.1) | |
| Sex (n, % women) | 1403 (62.1) | 920 (60.4) | 423 (57.2) | |
| Education (n, %) | Low | 282 (12.5) | 162 (10.6) | 84 (11.4) |
| Middle | 1049 (46.4) | 698 (45.8) | 322 (43.5) | |
| High | 930 (41.1) | 663 (43.5) | 334 (45.1) | |
| CDR (n, % score .5) | 1343 (59.7) | 852 (56.2) | 375 (50.7) | |
| APOE e4 (n, % carrier) | 640 (29.8) | 445 (30.5) | 219 (30.6) | |
| Cognitive status at baseline (n, %) | no MCI | 352 (15.6) | 263 (17.3) | 136 (18.4) |
| aMCI | 1182 (52.3) | 760 (49.9) | 332 (44.9) | |
| naMCI | 725 (32.1) | 500 (32.8) | 272 (36.8) | |
| Cognitive status at last follow‐up (n, %) | no MCI | 586 (25.9) | 464 (30.5) | 231 (31.2) |
| aMCI | 728 (32.2) | 402 (26.4) | 171 (23.1) | |
| naMCI | 729 (32.3) | 505 (33.2) | 274 (37.0) | |
| incident dementia | 216 (9.6) | 152 (10.0) | 64 (8.6) | |
| Average follow‐up time by cognitive status at last follow‐up (n, %) | no MCI | 3.63 (1.05) | 3.90 (.52) | 3.97 (.36) |
| aMCI | 2.79 (1.61) | 3.68 (.78) | 3.74 (.73) | |
| naMCI | 3.33 (1.33) | 3.85 (.57) | 3.89 (.52) | |
| incident dementia | 1.33 (1.09) | 1.52 (1.04) | 1.42 (1.02) | |
| Semantic fluency (mean, SD) | 28.29 (8.73) | 28.97 (8.63) | 29.66 (8.52) | |
| Letter fluency (mean, SD) | 20.37 (7.18) | 20.81 (7.21) | 21.18 (7.12) | |
| Birth country (n, %) | France | 1957 (86.6) | 1342 (88.1) | 657 (88.8) |
| Algeria | 96 (4.2) | 61 (4.0) | 24 (3.2) | |
| Morocco | 39 (1.7) | 29 (1.9) | 22 (3.0) | |
| Tunisia | 25 (1.1) | 15 (1.0) | 10 (1.4) | |
| Other | 144 (6.4) | 76 (5.0) | 27 (3.6) | |
| Native language French (n, %) | 114 (5.0) | 69 (4.5) | 23 (3.1) |
Abbreviations: 18F‐FDG‐PET, 18F‐fluorodeoxyglucose brain positron emission tomography; aMCI, amnestic MCI; APOE, apolipoprotein E; CDR, Clinical Dementia Rating; MCI, mild cognitive impairment; MRI, magnetic resonance imaging; naMCI, non‐amnestic MCI; SD, standard deviation.