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Table 2 Control vs. ADHD: group differencesa in the P1 component in the midline 10–20 electrodesb

From: Impaired early information processing in adult ADHD: a high-density ERP study

CHANNEL GROUP (μv, SE) F P
ADHDc CONTROLc
Fz −0.87 (0.09) −0.83 (0.09) 0.07 ~ 1.0
FCz −1.20 (0.09) −1.63 (0.09) 11.82 0.1541
Cz −0.85 (0.06) −1.61 (0.06) 71.88 <.0001
Pz 0.94 (0.09) 1.49 (0.09) 18.57 0.0101
Oz 4.12 (0.15) 6.32 (0.15) 104.45 <.0001
  1. a Random Regression Hierarchical Linear Model analysis with group, time and interaction as independent variables, and with age, gender and years of education as covariates
  2. bTime window for the P1 component: 120-150 ms poststimulus
  3. c Least-squares means estimates (SE) of stimulus-locked ERP amplitudes for a given study group, adjusted for age, gender and years of education