Table 1. Baseline Sample Characteristics of 81 Participants by Aβ Status at Follow-up (July 2010 Through November 2012)a.
| Follow-up |
P Valueb |
|||
|---|---|---|---|---|
| Characteristic | Aβ Positive (n = 61) |
Aβ Negative (n = 20) |
Unadjusted | Adjusted |
| Age, mean (SD), y | 87.6 (2.9) | 86.7 (2.6) | .25 | .25 |
|
| ||||
| BMI, mean (SD) | 26.6 (4.5) | 25.6 (5.2) | .41 | .45 |
|
| ||||
| Female sex | 20 (32.8) | 7(35.0) | .53 | .90 |
|
| ||||
| ApoE4 allele (n = 76) | 12 (21.0) | 0 (0.0) | .03 | .03 |
|
| ||||
| Antihypertensive medication use | 45 (73.8) | 11 (55.0) | .10 | .09 |
|
| ||||
| Mild cognitive impairment | 10 (16.4) | 3 (15.0) | .60 | .98 |
Abbreviations: Aβ, β-amyloid; ApoE4, apolipoprotein E4; BMI, body mass index (calculated as weight in kilograms divided by height in meters squared).
a
Values are presented as number (percentage) unless otherwise indicated. Aβ status was determined using the iterative outlier method (standardized uptake value ratio of >1.57).
b
Unadjusted P value from Fisher exact test. P value from logistic regression model was adjusted for age and sex.