Table 3.
Association of Time since Baseline and Cognitive Status for Birth Cohorts, n = 25,660.
| Characteristic | Years since Baseline | Normal, n (%) | CIND, n (%) | Dementia, n (%) | Total N | Rank Correlation |
|---|---|---|---|---|---|---|
| AHEAD and CODA | 0 | 2,365 (66.7) | 927 (26.1) | 254 (7.2) | 3,546 | 0.32 |
| 2 | 1,638 (64.0) | 686 (26.8) | 236 (9.2) | 2,560 | ||
| 4 | 1,249 (58.1) | 676 (31.5) | 224 (10.4) | 2,149 | ||
| 6 | 1,111 (54.6) | 634 (31.1) | 291 (14.3) | 2,036 | ||
| 8 | 531 (57.8) | 263 (28.6) | 125 (13.6) | 919 | ||
| 10 | 395 (54.3) | 237 (32.6) | 96 (13.2) | 728 | ||
| 12 | 346 (54.3) | 210 (33.0) | 81 (12.7) | 637 | ||
| HRS | 0 | 5,215 (80.8) | 1,024 (15.9) | 217 (3.4) | 6,456 | 0.20 |
| 2 | 4,350 (80.6) | 852 (15.8) | 196 (3.6) | 5,398 | ||
| 4 | 3,948 (76.8) | 963 (18.7) | 231 (4.5) | 5,142 | ||
| 6 | 3,787 (73.4) | 1,091 (21.1) | 282 (5.5) | 5,160 | ||
| 8 | 2,564 (73.9) | 713 (20.5) | 195 (5.6) | 3,472 | ||
| 10 | 265 (71.1) | 715 (20.5) | 205 (6.4) | 3,185 | ||
| 12 | 2,131 (70.7) | 677 (22.5) | 208 (6.9) | 3,016 | ||
| War Babies | 0 | 2,484 (87.7) | 295 (10.4) | 52 (1.8) | 2,831 | 0.10 |
| 2 | 2,153 (87.3) | 276 (11.2) | 36 (1.5) | 2,465 | ||
| 4 | 2,040 (86.7) | 274 (11.6) | 40 (1.7) | 2,354 | ||
| 6 | 2,009 (84.4) | 329 (13.8) | 43 (1.8) | 2,381 | ||
| 8 | 1,539 (85.4) | 216 (12.0) | 48 (2.7) | 1,803 | ||
| 10 | 1,373 (84.6) | 215 (13.3) | 35 (2.2) | 1,623 | ||
| 12 | 1,385 (86.7) | 173 (10.8) | 40 (2.5) | 1,598 | ||
| Baby Boomers | 0 | 10,883 (84.8) | 1,707 (13.3) | 237 (1.9) | 12,827 | 0.02 |
| 2 | 10,048 (84.5) | 1,598 (13.4) | 252 (2.1) | 11,898 | ||
| 4 | 6,155 (85.6) | 897 (12.5) | 138 (1.9) | 7,190 | ||
| 6 | 6,060 (85.0) | 906 (12.7) | 166 (2.3) | 7,132 | ||
| 8 | 5,414 (85.4) | 778 (12.3) | 150 (2.4) | 6,342 | ||
| 10 | 2,110 (85.9) | 301 (12.3) | 46 (1.9) | 2,457 | ||
| 12 | 2,126 (87.2) | 265 (10.9) | 48 (2.0) | 2,439 |
AHEAD, Asset and Health Dynamics Among the Oldest Old; CIND, cognitive impairment, not demented; CODA, Children of the Depression; HRS, Health and Retirement Study.