| Overall, N = 6792 | Male, n = 3494 | Female, n = 3298 | P value |
---|---|---|---|---|
Cognition at baseline, mean (SD) | ||||
 Global cognition | 11.84 (3.26) | 12.31 (3.07) | 11.34 (3.38) | < 0.001 |
 Mental status | 7.99 (2.52) | 8.51 (2.30) | 7.45 (2.62) | < 0.001 |
 Episodic memory | 3.85 (1.60) | 3.80 (1.57) | 3.89 (1.63) | 0.018 |
Cognition at 2015, mean (SD) | ||||
 Global cognition | 10.96 (3.93) | 11.51 (3.60) | 10.38 (4.16) | < 0.001 |
 Mental status | 7.39 (2.91) | 7.96 (2.65) | 6.79 (3.04) | < 0.001 |
 Episodic memory | 3.47 (1.79) | 3.44 (1.74) | 3.50 (1.83) | 0.226 |
Absolute cognitive decline during 2011–2015, mean (SD) | ||||
 Global cognition | 0.88 (3.44) | 0.88 (3.38) | 0.88 (3.50) | 0.969 |
 Mental status | 0.58 (2.71) | 0.59 (2.67) | 0.57 (2.76) | 0.781 |
 Episodic memory | 0.37 (1.86) | 0.37 (1.83) | 0.37 (1.89) | 0.982 |
Groups of global cognition change, n (%) a | ||||
 No decline | 3119 (47.55) | 1612 (47.87) | 1507 (47.20) | 0.859 |
 Moderate decline | 1791 (27.30) | 914 (27.15) | 877 (27.46) |  |
 Severe decline | 1650 (25.15) | 841 (24.98) | 809 (25.34) |  |
Groups of mental status change, n (%) b | ||||
 No decline | 3637 (54.67) | 1898 (55.37) | 1739 (53.93) | 0.499 |
 Moderate decline | 1531 (23.02) | 779 (22.72) | 752 (23.33) |  |
 Severe decline | 1484 (22.31) | 751 (21.91) | 733 (22.74) |  |
Groups of episodic memory change, n (%) c | ||||
 No decline | 3442 (51.74) | 1769 (51.60) | 1673 (51.89) | 0.884 |
 Moderate decline | 1683 (25.30) | 876 (25.55) | 807 (25.03) |  |
 Severe decline | 1527 (22.96) | 783 (22.85) | 744 (23.08) |  |