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CSF levels of sphingomyelin:cholesterol ratios are associated with worse performance on trial 5 and delayed recall in the Rey Auditory Verbal Learning Test. Correlations for CSF levels of sphingomyelin (total):cholesterol (total) ratios are shown. The correlation coefficient (b) and exact significance level (p) are indicated in insets. n = 31 subjects. Linear regression with age- and education-adjusted z-scores.
