Table 3.
Group Performance on the Rey Auditory Verbal Learning Test (RALVT) and Cambridge Automated Neuropsychological Testing Battery Spatial Working Memory Task (SWM)
| Ketamine Users | Schizophrenia Patients | Polydrug Control Subjects | Non-Drug-Using Control Subject | Fp | |
|---|---|---|---|---|---|
| RVLT Free Recall | 48.95 (6.10) | 43.25 (9.67)a | 45.80 (6.80) | 54.84 (5.48)× | 9.164 <.001 |
| RVLT Interference | 10.18 (1.79) | 8.35 (2.28)b | 9.67 (2.61) | 11.47 (2.12) | 6.854 <.001 |
| RVLT 30-min Free Recall | 10.36 (2.32) | 7.80 (2.65) | 9.00 (2.14) | 11.84 (2.61) | 9.749 <.001 |
| SWM Strategy Score | 31.09 (5.63) | 32.50 (8.13) | 32.53 (6.42) | 32.58 (4.49) | .275 .844 |
| SWM Total Errors | 15.68 (14.29) | 30.40 (19.81)b | 18.87 (15.59) | 16.95 (13.06) | 3.623 .017 |
Measures are mean (standard deviation). Differences from ketamine group in planned comparisons: schizophrenia versus ketamine, polydrug versus ketamine, control versus ketamine.
a
Nonsignificant trend.
b
p = .05.