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Table 2 Observed prevalence of cognitive impairment by socio-demographic characteristics

From: Prevalence and incidence of cognitive impairment in an elder Portuguese population (65–85 years old)

Characteristics

n

Prev. % (95% CI)

p-value

OR (95% CI) Adjusted

Sex

 Female

67

18.9 (14.9–23.3)

0.006*

1 [reference]a

 Male

24

10.4 (6.7–15.1)

0.95 (0.89–1.01)

Age (years)

  [65–69]

24

11.1 (9.3–17.2)

0.026*

1 [reference]b

  [70–74]

30

15.0 (11.0–21.1)

1.03 (0.97–1.10)

  [75–79]

24

20.0 (13.3–28.3)

1.10 (1.02–1.19)

 [80–85]

13

26.0 (17.3–40.2)

1.14 (1.03–1.27)

Education

 0

26

45.6 (32.4–59.3)

0.000*

1 [reference]c

  [1–9]

51

11.8 (8.9–15.2)

0.72 (0.66–0.80)

  ≥ 10

14

14.4 (8.1–23.0)

0.74 (0.67–0.84)

Marital Status

 Married/Civil Union

52

14.9 (11.3–19.0)

0.584

1 [reference]d

 Single, divorced, widower

39

16.5 (12.0–21.9)

0.96 (0.90–1.02)

Employment Status

 Work

6

12.0 (4.6–24.3)

0.471

1 [reference]a

 Retired

67

14.4 (11.4–18.0)

99.6 (0.90–1.10)

 Housewives

17

23.9 (14.6–35.5)

1.07 (0.94–1.22)

  1. Legend: Prev Prevalence, OR odds ratio. 95% CI: 95% confidence interval
  2. aadjusted for age and education
  3. badjusted for sex and education
  4. cadjusted for sex and age
  5. dadjusted for sex, age and education
  6. * Significant at p < 0.05