TABLE 3.
Comparison of the demographic characteristics of the baseline Chicago Health and Aging Project (CHAP) analytic sample1
| Analytic sample for MedDiet scores |
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| Characteristic | All(n = 3790) | Lowest tertile: 12–25 (n = 1163) | Middle tertile: 26–29 (n = 1251) | Highest tertile: 30–45 (n = 1376) |
| Age (y) | 75.4 ± 6.22 | 75.9 ± 6.5 | 75.5 ± 6.3 | 74.9 ± 5.8 |
| Sex (% female) | 61.7 | 63.5 | 63.4 | 58.8 |
| Race (% black) | 60.2 | 69.4 | 63.3 | 49.3 |
| Smoking (% current) | 14.5 | 16.8 | 14.9 | 12.2 |
| Education (y) | 12.2 ± 3.7 | 11.3 ± 3.5 | 11.9 ± 3.6 | 13.2 ± 3.6 |
| BMI (kg/m2) | 27.1 ± 5.5 | 27.4 ± 5.9 | 27.3 ± 5.6 | 26.7 ± 5.1 |
| Stroke (%) | 7.3 | 8.2 | 8.0 | 5.9 |
| Hypertension (%) | 53.1 | 54.3 | 56.0 | 49.5 |
| Global cognitive score | 0.18 ± 0.73 | 0.04 ± 0.75 | 0.13 ± 0.74 | 0.36 ± 0.65 |
| Mini-Mental State Examination | 26.5 ± 4.1 | 25.9 ± 4.3 | 26.2 ± 4.3 | 27.3 ± 3.3 |
| CES-D (10-item) | 1.5 ± 1.9 | 1.7 ± 2.0 | 1.6 ± 2.0 | 1.2 ± 1.7 |
| Multivitamin use (%) | 34.0 | 27.4 | 32.0 | 41.5 |
1
The baseline sample consists of participants with valid food-frequency questionnaires and with ≥2 cognitive tests available (such tests conducted every 3 y). CES-D, Center for Epidemiologic Studies–Depression scale. Significant differences were observed across tertiles (P values from <0.05 to <0.0001 on the basis of ANOVA and chi-square tests).
2
Mean ± SD (all such values).