Table 3.
Observed incidence of cognitive impairment by socio-demographic characteristics
| Characteristics | n | Incidence (95% CI) per 1000 person-years | p-value | RR (95% CI) Adjusted |
|---|---|---|---|---|
| Sex | ||||
| Female | 34 | 33.8 (24.2–47.4) | 0.084 | 1 [reference]a |
| Male | 14 | 18.0 (10.7–30.5) | 0.66 (0.35–1.27) | |
| Age (years) | ||||
| [65–69] | 19 | 21.1 (13.5–33.1) | 0.142 | 1 [reference]b |
| [70–74] | 16 | 25.8 (15.8–42.2) | 1.29 (0.66–2.52) | |
| [75–79] | 8 | 43.5 (21.7–86.9) | 2.20 (0.96–5.05) | |
| [80–85] | 5 | 66.0 (27.5–158.7) | 2.01 (0.72–5.58) | |
| Education | ||||
| 0 | 10 | 126.4 (68.0–234.8) | 0.005* | 1 [reference]c |
| [1–9] | 29 | 21.6 (15.0–31.0) | 0.21 (0.10–0.47) | |
| ≥ 10 | 9 | 25.3 (13.2–48.7) | 0.25 (0.10–0.65) | |
| Marital Status | ||||
| Married/Civil Union | 26 | 23.6 (16.1–34.6) | 0.296 | 1 [reference]d |
| Single, divorced, widower | 22 | 32.5 (21.4–49.4) | 1.03 (0.55–1.93) | |
| Employment Status | ||||
| Work | 4 | 18.1 (6.8–48.3) | 0.911 | 1 [reference]a |
| Retired | 40 | 30.0 (21.3–37.9) | 1.30 (0.44–3.79) | |
| Housewives | 4 | 22.3 (24.2–47.4) | 0.79 (0.19–3.31) | |
Legend: RR relative risk. 95%, CI 95% confidence interval
aadjusted for age and education
badjusted for education and sex
cadjusted for age and sex
dadjusted for sex, age and education
*Significant at p < 0.05