As shown in Table 2 and Figure 2, higher plasma transferrin levels were associated with a steeper increase in the CDR-SB scores among patients with MCI (estimate = 0.15, p = 0.009) and AD (estimate = 0.59, p = 0.007), but not the CN group (estimate = 0.01, p = 0.45). Here, TF is linked to Alzheimer disease.