TABLE 1.
Demographics and Summary Scores of Cognitive Measurements for this sample. We did not conduct a statistical test on Global PiB (SUVR) since this is how these groups were defined.
| PiB Positive (N = 13) |
PiB Negative (N = 37) |
||||
|---|---|---|---|---|---|
| Variable | Mean (SD) |
95% CI for Mean Difference | Test Statistic (df) | p Value | |
| N (%) | |||||
| Age (years) | 77 (6) | 75 (7) | (−7.4, 1.3) | t(20.6) = −1.44 | 0.16 |
| Sex | 6 M (46%) | 13 M (35%) | NA | X(1) = 0.09 | 0.76 |
| Race | 11 CC (85%) | 30 CC (81 %) | NA | X(3) = 7.70 | 0.05 |
| Education (years) | 14 (3) | 15 (3) | (−0.7, 2.6) | t(21) = 1.21 | 0.24 |
| MMSE | 29 (2) | 29 (1) | (−1.2, 1.3) | t(16.3) = −0.07 | 0.94 |
| Boston Naming test (# spontaneously correct) | 56.3 (5.3) | 56.9 (3.9) | (−2.8, 4.2) | t(15) = 0.41 | 0.69 |
| Letter fluency (# words, sum F, A, S) | 48.3 (13.8) | 42.5 (13.8) | (−16.1, 4.4) | t(17.7) = −1.19 | 0.25 |
| Category fluency (# words in 60sec) | 20.2 (5.3) | 19.8 (4.6) | (−3.6, 2.7) | t(24) = −0.29 | 0.77 |
| Global PiB (SUVR) | 2.03 (0.33) | 1.44 (0.12) | (−0.8, −0.39) | ||
| ROCF (points, max 24) | 16.6 (2.9) | 15.7 (3.4) | (−1.13, 2.91) | t(24.8) = 0.91 | 0.37 |
| Stroop (# correct) | 10.9 (2.5) | 12.5 (2.1) | (−0.1, 3.2) | t(18) = 2.0 | 0.06 |
| Trails(B-A) (sec) | 104.8 (55.4) | 70.7 (23.8) | (−68.6, −0.41) | t(13.7) = −2.18 | 0.05 |
| DSST (out) (# correct pairs) | 46.1 (15.5) | 52.8 (9.9) | (−2.98, 16.49) | t(15.6) = 1.47 | 0.16 |
| WLL (words recalled) | 7.4 (1.9) | 7.3 (1.9) | (−1.46, 1.29) | t(18.8) = −0.13 | 0.90 |
| DSST RT (Correct Trials-RT) | 1509.7 (386.6) | 1472.6 (246.4) | (−280.7, 206.4) | t(15.6) = −0.32 | 0.75 |
| DSST percent accuracy | 0.84 (0.15) | 0.87 (0.12) | (−0.06, 0.13) | t(17.3) = 0.70 | 0.5 |