Table 1.
Characteristics of the included BPRHS study subsample relative to the excluded subsample
| Study subsample (n = 736) |
Excluded subsample (n = 763) |
|||
|---|---|---|---|---|
| Mean (SD)/N (%) | N missing | Mean (SD)/N (%) | pc | |
| MMSE (mean) | 23.3 (3.5) | 0 | 23.2 (3.5) | 0.65 |
| Age (y) | 57.9 (7.5) | 0 | 57.2 (7.7) | 0.66 |
| Female sex % | 73.0% | 0 | 68.0% | 0.81 |
| Education (8th grade or below) | 48.8% | 0 | 44.3% | 0.09 |
| Dietary Quality (Mediterranean Score) | 4.4 (1.6) | 61 | 4.3 (1.6) | 0.33 |
| Physical Activity Scorea | 31.5 (4.6) | 0 | 31.6 (4.9) | 0.81 |
| Body mass index (kg/m2) | 32.2 (6.8) | 6 | 31.6 (6.6) | 0.11 |
| Type 2 diabetes | 38.1% | 0 | 41.8% | 0.16 |
| Hypertensionb | 70.2% | 0 | 66.1% | 0.11 |
| CRP (ng/mL) | 6.4 (8.6) | 2 | 6.1 (8.6) | 0.11 |
| APOE ε4 (presence of at least one allele) | 21.7% | 139 | 16.4% | 0.01 |
| CESDd | 20.3 (13.4) | 0 | 20.2 (12.9) | 0.97 |
| Current smoker | 23.0% | 2 | 26.1% | 0.18 |
Values are reported as mean and standard deviation (SD) or frequency.
a
derived physical activity score.
b
definition; Systolic blood pressure greater than 140mmHG or diastolic blood pressure greater or equal to 90mmHG or taking antihypertension medications.
c
p values reflect comparisons between study and excluded sub-cohort (Wilcoxon for continuous and chi-square for categorical.
d
Center for Epidemiologic Studies Depression Scale (range: 0–64).