Association of SNP genotypes with Aβ1−42 cerebrospinal fluid (CSF) levels. CSF Aβ1−42 levels (pg ml−1) measured in patients carrying different single-nucleotide polymorphism (SNP) genotypes. Because of high r2 values between rs646817 and rs1746659, and between rs12034383 and rs11803956, only results for rs646817 and rs12034383 are shown. Significant pairwise comparisons are indicated, that is, AA vs AG+GG for rs646817 and AA vs GG for rs12034383, with P-values corrected for age at lumbar puncture, disease duration at lumbar puncture, gender and APOE ɛ4 genotype. For rs646817, results of the association test under a dominant model are depicted.