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¶ |
†Statistical test between participants with or without cognitive impairment
‡Independent-samples t’-test
§Chi-square test
¶Mann-Whiteney U test