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Table 2 TOVA performance for patients with ADHD at baseline, and at months 6 and month 12 after methylphenidate treatment

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

  Month 0 (N = 103) Month 6 (N = 75) Month 12 (N = 75) Statistica Post-hoc tests
Omission errors −1.09 (1.55) −1.00 (1.47) −1.17 (1.61) 0.90 (0.408) NS
Commission errors −0.22 (1.49) 0.01 (1.22) 0.16 (1.05) 3.66 (0.029)* Month 12 > Month 0 **
Response time −0.83 (1.40) −0.75 (1.24) −0.79 (1.23) 0.43 (0.654) NS
Response time variability −1.06 (1.47) −0.91 (1.31) −0.99 (1.36) 1.17 (0.315) NS
Response sensitivity (d’) −0.85 (0.88) −0.65 (0.92) −0.67 (0.93) 3.71 (0.026)* Month 6 > Month 0 **
ADHD score −2.22 (3.29) −2.00 (3.08) −2.09 (3.23) 0.95 (0.390) NS
  1. Note: TOVA results are reported as standard deviations from the norm, and expressed as mean (SD); month 0 data is pretreatment data; a statistical values are expressed as F (p-value) using linear mixed model analysis; NS = non-significant; *p<0.05, **p<0.01.