Table 6. Mean, Standard Deviation, and Median of Continuous Cognitive Function Factor Scores by Treatment Group

Factor 1 = verbal memory and language comprehension, short-term and delayed; factor 2 = figural or visual memory, short-term and delayed; factor 3 = attention and concentration; factor 4 = visuo spatial orientation, psychomotor processing speed and attention.

Total factor score is the sum of the four independent factor scores; total 6-week factor change is the difference in mean factor score at 6 weeks compared with baseline; smaller total 6-week factor change indicates less improvement from baseline.