Table 4.
Response rates of cognitive tests by age and schooling among the 14,594 participants of ELSA-Brasil
| Age groups/schooling* | Memory testsa 14,454 (99.0 %) | VFT (animal) 14,568 (99.8 %) | VFT (letter F) 14,539 (99.6 %) | Trail B 13,160 (90.2 %) |
|---|---|---|---|---|
| 35–44 years-old | ||||
| 14+ | 1919 (100) | 1919 (99.9) | 1917 (99.9) | 1904 (99.2) |
| 11–14 | 1230 (100) | 1228 (99.8) | 1224 (99.5) | 1186 (96.4) |
| 8–10 | 97 (100) | 96 (99.0) | 96 (99.0) | 80 (82.4) |
| <8 | 32 (96.7) | 33 (100) | 33 (100) | 20 (60.6) |
| p** = 0.001 | p = 0.15 | p = 0.10 | p = 0.001 | |
| 45–64 years-old | ||||
| 14+ | 4929 (99.9) | 4924 (99.8) | 4924 (99.8) | 4868 (98.7) |
| 11–14 | 3512 (99.9) | 3508 (99.7) | 3505 (99.7) | 3124 (88.8) |
| 8–10 | 729 (98.8) | 732 (99.2) | 732 (99.2) | 506 (68.6) |
| <8 | 541 (85.1) | 633 (99.5) | 618 (97.2) | 279 (43.9) |
| p = 0.001 | p = 0.01 | p = 0.001 | p = 0.001 | |
| 65–74 years-old | ||||
| 14+ | 842 (100) | 841 (99.9) | 840 (99.8) | 808 (96.0) |
| 11–14 | 313 (100) | 313 (100) | 313 (100) | 234 (74.8) |
| 8–10 | 154 (98.7) | 155 (99.4) | 155 (99.4) | 83 (53.2) |
| <8 | 157 (86.7) | 181 (100) | 178 (98.3) | 50 (27.6) |
| p = 0.01 | p = 0.29 | p = 0.03 | p = 0.001 | |
aNumber and proportions of participants who performed the tests
*Memory and Trial B tests presented a p < 0.001 for Mantel-Haenzel chi-square for trend across the age strata
**p values for Chi-square tests across levels of educatio