Table 4. Multivariable logistic and linear regression model.

	OR	95% CI	p
Age, years	1.06	1.02–1.10	0.004
Premorbid IQ	0.93	0.88–0.98	0.004

CI: cognitive impairment. EDSS: Expanded Disability Status Scale. IQ: intelligence quotient. OR: Odds Ratio. Covariates in the models: age, age at onset, EDSS median, mean premorbid IQ score, physical activity in childhood-adolescence, disease course, sex.