Table 3.
AUC-consistent versus AUC-inconsistent late-onset group characteristics
| Variable | AUC-consistent, N = 15 | AUC-inconsistent, N = 13 | P-value |
|---|---|---|---|
| Age of disease onset, y | 77.0 (5.8) | 72.8 (4.6) | .049 |
| Age at scan, y | 81.6 (6.2) | 76.8 (4.0) | .025 |
| Disease duration | 4.4 (2.8) | 3.8 (2.0) | .5 |
| Education, y | 16.3 (2.4) | 15.7 (3.1) | .6 |
| Sex, M/F | 7/8 | 7/6 | .7 |
| Positive family history, % | 20 | 39 | .3 |
| New patient, % | 47 | 62 | .4 |
| Positive amyloid PET read, % | 47 | 69 | .2 |
| Mean SUVR | 1.35 (0.36) | 1.35 (0.26) | .98 |
| SUVR > 1.17, % | 60 | 77 | .3 |
| Change in diagnosis, % | 53 | 23 | .1 |
| Change in therapy, % | 43 | 77 | .072 |
Abbreviations: AUC, Appropriate Use Criteria; PET, positron emission tomography; SUVR, standard uptake volume ratio.
NOTE. Bold text indicates significant P value. Italicized text indicates trending P value.