Table 1.

Numbers of participants that completed each of the seven cognitive tasks, with available predicted C4A and C4B expression values and brain imaging data

Cognitive task	With predicted C4A and C4B expression (n)	With C4A and C4B expression Values and Brain Imaging Data (n)
Pairs matching	329 465	21 989
Reaction time	327 815	22 064
Fluid Intelligence	106 633	7484
Digit span	34 171	2195
Symbol Digit Substitution	81 444	11 696
Trail Making A	71 933	10 427
Trail Making B	71 931	10 427