NEFL and multiple sclerosis: These two groups were best predicted by the higher baseline serum neurofilament light chain (sNfL) levels (Exp(B) = 0.031, P = 0.01) in the non-relapsing DP people with multiple sclerosis when compared to people with multiple sclerosis that had concurrent DP and relapses over the follow-up (accuracy of 74.1, Nagelkerke R2 = 0.187).