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Table 4 Response rates of cognitive tests by age and schooling among the 14,594 participants of ELSA-Brasil

From: Education plays a greater role than age in cognitive test performance among participants of the Brazilian Longitudinal Study of Adult Health (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

  1. aNumber and proportions of participants who performed the tests
  2. *Memory and Trial B tests presented a p < 0.001 for Mantel-Haenzel chi-square for trend across the age strata
  3. **p values for Chi-square tests across levels of educatio