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Conners’ Teacher Rating Scale has limited ability to predict DSM-IV ADHD in referred schoolchildren

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What is the predictive validity of the revised Conners’ Teacher Rating Scale (CTRS-R) for identifying children with attention deficit hyperactivity disorder (ADHD) in a clinical sample compared with the Telephone Teacher Interview (T TI-IV)?


1038 children aged 6–12 years referred for assessment of attention, learning and behavioural problems to a pae-diatric clinic (mean age 8.8 years, 75.5% male). Children on psychotropic medications other than stimulants, attending full time treatment programmes, with premature birth, history of serious head trauma, a chronic medical condition, recent history of abuse or who were adopted were excluded.


Outpatient paediatric clinic, Toronto, Canada; May 1996–February 2006.


The CTRS-R, a 59 item teacher report form used to identify children with ADHD and associated behavioural difficulties. This was given to teachers by parents and completed before clinical assessment. Three subscales (L, M and N) were used to identify DSM-IV subtypes (inattentive, hyperactive/impulsive and combined, respectively). Scores were converted to T scores, scaled for age and gender, and a score of 50 taken as the mean score for the population. A cut-off T score of >60 was used to detect the presence of …

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  • Sources of funding Canadian Institute for Health Research.


  • Competing interests None

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