[Course of illness and prognosis of multiple sclerosis. 2: Predictive value of clinical and paraclinical factors].

The second part of this review summarizes the predictive value of demographic factors, the early clinical course and paraclinical methods in the prognosis of multiple sclerosis (MS). The chronic progressive course is generally thought to be associated with a worse outcome compared to relapsing-remitting MS. Moderate disability within 5 years, residual pyramidal and cerebellar deficits 6 months following an acute attack, motor, cerebellar and possibly brain stem exacerbations as well as frequent relapses were found to indicate an increased risk for developing severe disability or increased mortality. Magnetic resonance imaging (MRI), evoked potentials and cerebrospinal fluid findings were not found to be predictive in clinically definite MS, although there was a weak association of MRI findings and disability. However, these paraclinical modalities were important methods to predict the further development of clinically isolated demyelinating syndromes. In this regard, MRI was identified as the strongest predictive factor of the conversion to definite MS.