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Table 1 Age, gender and performance in TOVA for children with ADHD between subtypes at baseline

From: Long-term neurocognitive effects of methylphenidate in patients with attention deficit hyperactivity disorder, even at drug-free status

  Inattentive type (n = 54) Hyperactive-impulsive type (n = 5) Combined type (n = 44) Statistica
Age (years) 9.4 (1.9) 8.8 (1.5) 8.7 (2.0) 3.31 (0.192)
Gender (female/male), n (%) 14 (25.9)/40 (74.1) 0 (0)/5 (100) 7 (15.9)/37 (84.1) 2.19 (0.308)
Omission errors −1.01 (1.52) −1.89 (2.18) −1.11 (1.52) 0.80 (0.672)
Commission errors −0.06 (1.42) −0.37 (1.41) −0.41 (1.60) 4.68 (0.097)
Response time −0.76 (1.25) −0.43 (0.90) −0.96 (1.61) 0.77 (0.682)
Response time variability −0.87 (1.53) −0.95 (0.76) −1.31 (1.45) 1.90 (0.387)
Response sensitivity (d’) −0.74 (0.93) −1.02 (1.02) −0.97 (0.81) 0.94 (0.626)
ADHD score −1.49 (2.94) −1.52 (2.27) −3.32 (3.60) 3.77 (0.152)
  1. Note: TOVA results are reported as standard deviations from the norm; data are expressed as mean (SD) or n (%); a statistical values are expressed as χ 2 (p-value) using Kruskal Wallis Test or Fisher’s Exact Test.