Table 3. Differences of K-WAIS-IV observed IQs and KART-predicted IQs between CNv and AD groups.
| CNv | AD | t | p-value | |||
|---|---|---|---|---|---|---|
| Mean(SD) | Range | Mean(SD) | Range | |||
| KART-FSIQ | 114.4(7.9) | 100.0–128.5 | 109.3(15.5) | 65.9–123.9 | 1.63 | .11 |
| Observed FSIQ | 118(12.8) | 90.0–132.0 | 78.9(21.1) | 44.0–111.0 | 7.41 | < .001 |
| KART-VCI | 116.7(8.5) | 102.5–131.9 | 113.1(12.9) | 79.5–127.1 | 1.27 | .21 |
| Observed VCI | 114.4(13.9) | 92.0–134.0 | 89.5(19.3) | 59.0–120.0 | 5.78 | < .001 |
| KART-PRI | 108.0(4.8) | 96.2–115.5 | 103.2(12.7) | 60.7–114.7 | 1.96 | .06 |
| Observed PRI | 106.6(10.9) | 86.0–126.0 | 80.5(21.1) | 50.0–109.0 | 6.09 | < .001 |
| KART-WMI | 111.8(6.6) | 98.3–123.5 | 106.8(14.4) | 63.8–120.0 | 1.75 | .09 |
| Observed WMI | 110.3(11.7) | 87.0–142.0 | 87.8(15.1) | 52.0–115.0 | 6.50 | < .001 |
| KART-PSI | 109.5(5.4) | 100.7–119.3 | 106.6(9.6) | 81.5–116.1 | 1.49 | .14 |
| Observed PSI | 107.4(9.8) | 92.0–125.0 | 75.3(19.9) | 50.0–110.0 | 8.00 | < .001 |
Note. CNv, cognitively normal validation group; AD, Alzheimer’s disease dementia; SD, standard deviation; KART, the Korean Adult Reading Test; K-WAIS-IV, Korean version of the Wechsler Adult Intelligence Scale, 4th edition; KART-FSIQ, KART-predicted Full Scale IQ; KART-VCI, KART-predicted Verbal Comprehension Index; KART-PRI, KART-predicted Perceptual Reasoning Index; KART-WMI, KART-predicted Working Memory Index; KART-PSI, KART-predicted Processing Speed Index.