After copying genotypes for MZ co-twins, there were 1,706 total sequenced individuals for association analysis. As noted, these individuals were selected to be sequenced based on phenotypic characteristics that were independent of their having been assessed in the psychophysiology lab. Because not all MCTFR participants completed a psychophysiological assessment, overlap between this sample and the sample for the psychophysiology GWAS used here is incomplete. The actual number with both sequences and psychophysiological measurements ranged from 802 to 1,185, depending on the phenotype. See Table 1 for more complete information on the study sample.
