Table 2. Performance on False Memory Measures for Individuals With Delusions at Baseline vs the Control Groupa.
| False memory measure | Control group (n = 549)b | Group with delusions at baseline (n = 42)c | Control group vs group with delusions at baselined |
|---|---|---|---|
| ADAS-Cog 13 | |||
| False recognition (maximum total score of 12) | 2 (0 to 4) | 3 (1 to 6) | U = 9398.5; P = .04 |
| Discrimination | 1.5 (0.9 to 2.1) | 1.3 (0.8 to 1.6) | U = 9451.0; P = .05 |
| Response bias, mean (SD) | −0.1 (0.6) | −0.0 (0.7) | t594 = −1.29; P = .20 |
| RAVLT | |||
| False recognition (maximum total score of 15) | 2 (1 to 4) | 2.5 (1 to 4) | U = 9806.0; P = .11 |
| Discrimination | 1.1 (0.5 to 1.7) | 0.7 (0.4 to 1.1) | U = 8738.5; P = .009 |
| Response bias | −0.4 (−0.8 to −0.1) | −0.5 (−0.8 to −0.1) | U = 11 078.5; P = .69 |
| Intrusions (maximum total score of 120) | 4 (2 to 9) | 6 (2 to 8) | U = 10 245.0; P = .55 |
Abbreviations: ADAS-Cog 13, 13-item Alzheimer’s Disease Assessment Scale–Cognitive Subscale; RAVLT, Rey Auditory Verbal Learning Test.
a
Unless indicated otherwise, values are presented as the median (IQR).
b
In the control group, there were 548 participants for RAVLT false recognition and 543 for RAVLT intrusions.
c
In the group with delusions, there were 40 participants for RAVLT intrusions.
d
For means (SDs), t values are presented with degrees of freedom. For medians (IQRs), U values are presented.