PMC

Mean salivary cortisol concentration by group status during cognitive-EEG testing. Mean raw cortisol concentration values shown in nmol/L during testing paradigm; Lab_1 was pre-task (baseline) measure; Lab_2 was obtained at the end of cognitive testing; Lab_3 was taken at end of entire assessment

Genetic GCM for cortisol sampling during cognitive EEG-testing paradigm and ADHD affection status, with age effects incorporated in Intercept and slope factor means. LAB_1 baseline, LAB_2 sampled at end of cognitive tasks, LAB_3 sampled at end of cognitive-EEG assessment, As ADHD affection status; I intercept, S slope, Esp residual measurement error, µ _i intercept mean; µ _s slope mean, μ _io overall mean of the intercept factor, μ _so overall mean of the slope factor, β _i age-dependent intercept mean, β _s age-dependent slope mean; the variances of the intercept and slope factors are 0.26 and 0.03, respectively; model presented for one twin only for ease of presentation