TABLE 1.

Descriptions of cognitive tests administered¹

Cognitive function test	Test assessment	Scoring
COWAT	Verbal fluency, language, and memory	Number of items from each category named in 120 s. COWAT 1 = animals; COWAT 2 = supermarket items. A higher score is better.
MMSE	Global cognition	Number of questions posing problems answered correctly out of a possible total of 30. A higher score is better.
TMT—Parts A and B (TMT A, TMT B)	Visual-motor coordination, attention, and ability to switch between tasks	Time taken for subject to first connect consecutively numbered circles (Part A) and then connect the same number of consecutively numbered and lettered circles alternating between the 2 sequences (Part B). A lower score is better.
DSST	Psychomotor speed, sustained attention, response speed, and visual-motor coordination	Number of symbols correctly matched with their corresponding digit in 120 s. A higher score is better.
RAVLT	Memory and recall: storage and retrieval of newly acquired verbal material	Average number of words recalled (0–15).RAVLT1: immediate recall as a sum of 4 trials. RAVLT2: short delay recall. RAVLT3: delayed recall. RAVLT4: delayed recognition.A higher score is better.

¹COWAT, Controlled Oral Word Association Test; DSST, Digit-Symbol Substitution Test; MMSE, Mini-Mental Status Examination; RAVLT, Rey Auditory Verbal Learning Test; TMT, Trail Making Test.