Table 1 Sample demographics
|  | Whole sample | Participants with normal cognition | Participants with screened MCI | P †|
|---|---|---|---|---|
Sample size (n, %) | 12,610 (100.0) | 3601 (100.0) | 1902 (100.0) | - |
Age (y, mean ± SD) | 67.3 ± 7.6 | 66.6 ± 7.1 | 68.6 ± 7.7 | < 0.0001‡ |
Gender (n, %) | ||||
 Male | 5441 (43.2) | 1612 (44.8) | 826 (43.4) | 0.3422§ |
 Female | 7169 (56.8) | 1989 (55.2) | 1076 (56.6) | |
GDS-30 score (P50, (P25, P75)) | 4 (2, 8) | 4 (2, 9) | 5 (2, 9) | < 0.0001¶ |
Degree of depressive symptoms (n, %) | ||||
 No | 11,412 (90.5) | 3267 (90.7) | 1708 (89.8) | 0.1441§ |
 Mild | 1122 (8.9) | 318 (8.8) | 178 (9.4) | |
 Moderate to severe | 76 (0.6) | 16 (0.5) | 16 (0.8) | |
Education-adjusted MoCA score (P50, (P25, P75)) | 24 (19, 28) | 27 (23, 30) | 18 (14, 21) | < 0.0001¶ |