Table 1 Descriptive statistics and phenotypic (below diagonal) and genetic (above diagonal) correlations for the UK Biobank cognitive and educational variables in all genotyped participants

From: Shared genetic aetiology between cognitive functions and physical and mental health in UK Biobank (N=112 151) and 24 GWAS consortia

Variable

Mean (s.d.)

Genetic/phenotypic correlation

  

Reaction time

Memory

Verbal-numerical reasoning

Educational attainment

Reaction time (ms)

555.08 (112.69)

—

0.179 (0.06)*

0.206 (0.05)*

0.066 (0.04)

Memory (errors)

4.06 (3.23)

0.116 (0.003)*

—

0.437 (0.06)*

0.126 (0.05)†

Verbal-numerical reasoning (max. score 13)

6.16 (2.10)

0.156 (0.005)*

0.176 (0.005)*

—

0.729 (0.04)*

Educational attainment

30.5% with degree

0.099 (0.003)*

0.052 (0.003)*

0.338 (0.005)*

—

  1. Genetic correlations are based on the results of genome-wide association studies of the UK Biobank variables. Standard errors for the correlations are shown in parentheses. For the phenotypic variables, Pearson correlations used for continuous–continuous correlations and point–biserial correlations for continuous–categorical correlations. All variables are coded such that higher scores indicate better performance. *P-value <0.0001; †P-value <0.05.
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