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Comparisons of cognitive scores at Wave 1 and Wave 2.
| Cognitive domain |
Wave 1 |
Wave 2 |
Difference |
||||
| N | Mean (SD) | N | Mean (SD) | N | Mean (SD) | p | |
| Immediate verbal recall | 5,705 | 5.87 (1.64) | 5,590 | 5.35 (1.89) | 5,584 | −0.51(2.30) | <0.01 |
| Delayed verbal recall | 5,626 | 5.15 (2.05) | 5,557 | 4.98 (2.15) | 5,473 | −0.17(2.72) | <0.01 |
| Digit span | 5,633 | 11.22(2.62) | 5,676 | 10.00(3.35) | 5,599 | −1.19(3.81) | <0.01 |
| Verbal fluency | 5,701 | 12.34(5.25) | 5,168 | 10.99(5.04) | 5,158 | −1.34(6.22) | <0.01 |
