Table 1.

Demographics and mean cognitive performance by T carrier status in the behavioral sample (N = 2230)

GenotypeCCCT/TTStatisticp
Females/males577/463677/513χ2(1) = 0.450.5
Age (SD)58.6 (14)58.2 (14)t(2228) = −0.690.5
Immediate free recall, composite score (SD)17.23 (4.7)17.82 (4.4)F(1,2226) = 9.240.002
SPT, immediate free recall8.51 (3.1)8.55 (3.2)F(1,2226) = 0.020.9
SPT, delayed cued recall9.87 (2.9)9.98 (2.8)F(1,2225) = 1.010.3
VT, immediate free recall4.82 (2.7)4.93 (2.9)F(1,2226) = 0.840.4
VT, delayed cued recall6.17 (3.3)6.26 (3.4)F(1,2226) = 0.340.6
Block design score (SD)26.4 (10.7)26.8 (10.6)F(1,2226) = 0.430.5
  • SPT, Subject performed task; VT, verbal task.