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. Author manuscript; available in PMC: 2023 Jul 1.
Published in final edited form as: J Pediatr Hematol Oncol. 2022 Oct 10;45(3):e350–e355. doi: 10.1097/MPH.0000000000002561

TABLE 2.

Working Memory, Processing Speed, and Math Calculation Performance in the Study Participants

Mean (SD) Range Effect Size3 % Impaired Observed % Impaired Expected4 Z-score5
WMI1 94.45 (15.50)** 62-33 0.36 12.68 6.68 1.47
PSI1 85.28 (14.84)*** 53-117 0.98 31.88 6.68 4.74
Math Calculation2 94.24 (15.41)** 61-134 0.37 12.68 6.68 1.47
1

Working Memory Index from the Wechsler Intelligence tests.

2

Processing Speed Index from the Wechsler Intelligence tests.

3

Composite score of Wechsler Individual Achievement, Third Edition (WIAT-III) Numerical Operations and Kaufman Test of Educational Achievement, Third Edition (KTEA-3) Math Calculation subtests.

3

Expected rate of impairment based on a normal distribution.

4

Cohen’s d; small=.2, medium =.5, large =.8.

5

z-score ratio for the significance of the difference between % impaired observed and % impaired expected.

*

P<0.05.

**

P <0.01.

***

P <0.001.