Table 2.

Mean scores and standard deviation (in parentheses) for the two cognitive tests, Auditory Verbal Learning (AVL) Test and Total Learning (TL) score, and Digit Symbol (DS) Coding (number of items correctly completed within the time limit), for subject groups classified with and without neurocognitive impairment (IHDS cut-off score of ≤ 9.5).

	SUBJECTS NOT IMPAIRED WITH IHDS (62%)	SUBJECTS IMPAIRED WITH IHDS (38%)	P-VALUE
NEUROPSYCHOLOGICAL MEASURES
WHO Auditory Verbal Learning Test (AVLT) (Total Learning, TL)	47.61 (9.11)	43.78 (8.42)	p = 0.023
Digit Symbol Coding (DS) (items completed correctly within time limit)	41.79 (14.47)	30.40 (11.98)	p < 0.001