Table 2.

Predictors of number of failed neuropsychological tests based on a linear regression model.

	β	p
EDSS	0.385	0.003
IQ	−0.6	0.068
BDNF rs6265 (Val/Met) polymorphism	−1.1	0.027

Adjusted R-square for the model: 0.184. EDSS, Expanded Disability Status Scale; IQ, intelligence quotient; BDNF, brain-derived neurotrophic factor. Covariates that were not retained in the final model are as follows: disease course, sex, age, disease duration, treatment with disease-modifying therapies, education, and number of relapses in the last year. The bold values are the statistically significant ones (p < 0.05).