Figure 5

Error plot of difference in CSF MMP-9 levels between the cognitively healthy elderly individuals with AD-indicative CSF biomarker levels (n = 7) compared with those with unaffected CSF biomarker levels (n = 27). CSF MMP-9 levels are presented in ng/ml. AD, Alzheimer's disease; CSF, cerebrospinal fluid; MMP, matrix metalloproteinase.