The alpha-2 macroglobulin five-nucleotide deletion (A2M-2) allele frequency
was not significantly higher in the AD group than the control group (0.062
versus 0.101, p > 0.1). The odds ratio for AD in individuals with the A2M-
2 allele was 0.582 (95% CI, 0.25 to 1.40). These results do not support the
association between A2M-2 and AD in the Chinese population, although the a
llele frequency of A2M-2 is lower than that found in the Caucasian populati
on. Therefore, A2M-2 might not be a significant risk factor of AD among Tai
wan Chinese.