Table 5 Association between N-224 concentrations and deviation from max Mini Mental State Examination (MMSE) score (= 30) at linear regression in subjective cognitive decline (SCD) and Alzheimer’s disease (AD) groups combined. Pathological MMSE score (< 24) was used as outcome in binary logistic regression and receiver operating characteristic (ROC) analyses. Correlation to MMSE is indicated by Spearman’s r