Table 2.

Comparison of neurocognitive groups on neuropsychological variables (Student’s t-distribution with 58 degrees of freedom).

Characteristics	Non-deficit (N = 29)	Deficit (N = 30)	Statistics
Premorbid IQ	−0.08 (1.13)	−1.03 (1.19)	t = 3.07, p = 0.003
Attention	−0.39 (1.5)	−4.41 (5.31)	t = 3.98, p < 0.001
Verbal memory	−0.73 (1.08)	−1.31 (1.08)	t = 2.04, p = 0.046
Visual memory	−0.47 (1.1)	−1.16 (1.09)	t = 2.41, p = 0.019
Working memory	−0.23 (0.51)	−0.84 (0.75)	t = 3.66, p = 0.001
Executive function	−0.21 (0.74)	−2.51 (2.56)	t = 4.72, p = 0.001
Processing speed	−1.02 (1.15)	−2.02 (0.89)	t = 3.75, p = 0.001