Table 2.
Average scores for cognitive tasks in the 2001, 2003, 2012, and 2015 observation waves of the Mexican Health and Aging Study by imputation status
| Observation Wave | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2001 (n=13,962) | 2003 (n=12,495) | |||||||
| Task, mean (SD) | Total | Non-imputed | Imputed | p-value | Total | Non-imputed | Imputed | p-value |
| Immediate word recall | 4.76 (1.29) | 4.77 (1.25) | 4.37) (1.92 | <0.01 | 4.37 (1.49) | 4.38 (1.48) | 4.03 (1.76) | <0.01 |
| Delayed word recall | 5.13 (1.86) | 5.15 (1.85) | 4.65 (2.01) | <0.01 | 4.31 (1.88) | 4.32 (1.88) | 3.92 (2.08) | <0.01 |
| Copy figure | 1.55 (0.73) | 1.65 (0.65) | 0.65 (0.88) | <0.01 | 1.62 (0.65) | 1.66 (0.62) | 1.35 (0.78) | <0.01 |
| Copy figure, delay | 0.73 (0.81) | 0.78 (0.82) | 0.29 (0.62) | <0.01 | 0.76 (0.81) | 0.79 (0.81) | 0.54 (0.76) | <0.01 |
| Visual scanning | 24.77 (15.9) | 26.36 (15.4) | 9.44 (12.2) | <0.01 | 24.17 (15.97) | 25.18 (15.9) | 11.39 (15.4) | <0.01 |
| Date naming | --- | --- | --- | --- | 2.45 (0.89) | 2.45 (0.89) | 2.50 (0.57) | 0.95 |
| Animal naming | --- | --- | --- | --- | --- | --- | --- | --- |
| Counting backwards | --- | --- | --- | --- | --- | --- | --- | --- |
| Serial 7s | --- | --- | --- | --- | --- | --- | --- | --- |
| *Total score | 36.9 (18.2) | 39.4 (17.2) | 19.5 (15.0) | <0.01 | 37.7 (18.8) | 40.2 (17.9) | 23.8 (17.7) | <0.01 |
p-values for independent t-tests comparing the average scores for each task between participants with non-imputed and imputed responses.
*
Participants who had missing data for one or more cognitive tasks were classified as missing for the total score.