Table 1.

Demographic information for different haplotype groups

Haplotypea	Major haplotype monozygotes (N = 92)	Heterozygote (N = 181)	Minor haplotype monozygotes (N = 86)	P‐value
Male/Female	52/40	85/96	48/38	0.216b
Age	19.39 ± 0.11	19.36 ± 0.08	19.49 ± 0.12	0.680c
Education year	12.28 ± 0.08	12.34 ± 0.06	12.38 ± 0.09	0.702c
Working memoryd				0.021e
2‐back accuracy	0.88 ± 0.07	0.90 ± 0.06	0.90 ± 0.06
3‐back accuracy	0.81 ± 0.07	0.82 ± 0.07	0.84 ± 0.06

^aThe haplotype was constructed from six SNPs: rs41420549|rs2981277|rs7013249|rs12681129|rs2930040|rs595255, major haplotype monozygotes = TATTTG/TATTTG, heterozygotes = TATTTG/AGCAAA, and minor haplotype homozygotes AGCAAA/AGCAAA

^b P value (Pearson_Chi‐square test).

^c p value (ANOVA).

^dAs described in the Methods section, only 350 subjects (89 major haplotype monozygotes, 177 heterozygotes, and 84 minor haplotype homozygotes) were included in the gene‐working memory analysis.

^e P value for main effects of RAB2A genotype (repeated measures ANCOVA).