Table 2. Percentage of patients reporting current cognitive problems.

Mental deficit	West Nile fever	West Nile neuroinvasive disease	Overall
Concentration	22	42*	31
Memory	28	42	35
Understanding	11	27	18
Decision making	16	25	20
Confusion	6	25*	15
Mean rate of complaints	17	32	24

*p<0.05, after logistic regression, controlling for marginal group difference in education.