K-index a predictor of T2 lesions in CIS, RIS
September 14, 2023…. The K-index was also useful to predict clinical events in CIS. The study obtained blood and CSF from 146 CIS patients and 36 individuals with RIS. Median age for the two groups was 38 and 46 years, respectively. The K-index was calculated as the ratio of kappa free light chain in CSF and serum divided by the ratio of albumin in CSF and serum. A value >8.9 was considered to be positive based on the results of a previous study (Levraut M et al. Ne…