TABLE 3.
ADNI demographics by site for the three sites with the largest number of acquired subjects
| A (Siemens) | B (General Electric) | C (General Electric) | p | |
|---|---|---|---|---|
| Number of subjects | 23 | 20 | 20 | |
| Age (mean [SD]) | 74.48 (5.13) | 76.90 (8.18) | 78.78 (6.19) | .11 |
| Diagnosis (%) | .57 | |||
| AD | 7 (30.4) | 6 (30.0) | 5 (25.0) | |
| CN | 6 (26.1) | 5 (25.0) | 2 (10.0) | |
| LMCI | 10 (43.5) | 9 (45.0) | 13 (65.0) | |
| Male (%) | 10 (43.5) | 13 (65.0) | 16 (80.0) | .05 |
Note: Manufacturer of each site's scanner is displayed in parentheses. ANOVA ‐values for testing differences in the mean of continuous variables and Chi‐squared test ‐values for testing the differences in categorical variables are reported in the rightmost column.
Abbreviations: AD, Alzheimer's disease; CN, cognitively normal; LMCI, late mild cognitive impairment.