Open Access Research article

The impact of study design and diagnostic approach in a large multi-centre ADHD study: Part 2: Dimensional measures of psychopathology and intelligence

Ueli C Müller12*, Philip Asherson3, Tobias Banaschewski124, Jan K Buitelaar5, Richard P Ebstein6, Jaques Eisenberg6, Michael Gill7, Iris Manor8, Ana Miranda9, Robert D Oades10, Herbert Roeyers11, Aribert Rothenberger12, Joseph A Sergeant13, Edmund JS Sonuga-Barke1114, Margaret Thompson14, Stephen V Faraone15 and Hans-Christoph Steinhausen11617

Author Affiliations

1 Department of Child and Adolescent Psychiatry, University of Zurich, Zurich, Switzerland

2 Departement Pädagogisch-Therapeutische Berufe, Hochschule für Heilpädagogik, Zurich, Switzerland

3 MRC Social Genetic Developmental and Psychiatry Centre, Institute of Psychiatry, London, UK

4 Department of Child and Adolescent Psychiatry and Psychotherapy, Central Institute of Mental Health, J 5, Mannheim, Germany

5 Department of Psychiatry, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands

6 Department of Psychology, Hebrew University, Jerusalem, Israel

7 Department of Psychiatry, School of Medicine, Trinity College Dublin, Dublin, Ireland

8 Geha MHC, Petach-Tikva, Israel

9 Department of Developmental and Educational Psychology, University of Valencia, Valencia, Spain

10 Clinic for Child and Adolescent Psychiatry and Psychotherapy, University of Duisburg-Essen, Essen, Germany

11 Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium

12 Department of Child and Adolescent Psychiatry, University of Göttingen, Göttingen, Germany

13 Department of Clinical Neuropsychology, Vrije Universiteit, Amsterdam, The Netherlands

14 School of Psychology, University of Southampton, Southampton, UK

15 Departments of Psychiatry and of Neuroscience and Physiology, SUNY Upstate Medical University, Syracuse, NY, USA

16 Aalborg Psychiatric Hospital, Aarhus University Hospital, Aalborg, Denmark

17 Clinical Psychology and Epidemiology, Institute of Psychology, University of Basel, Basel, Switzerland

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BMC Psychiatry 2011, 11:55  doi:10.1186/1471-244X-11-55

Published: 7 April 2011

Additional files

Additional file 1:

Table S1. Quantiles and trimmed means with confidence intervals of Conners' Questionnaires.

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Additional file 2:

Figure S1. Histograms of Conners' rating scales (CTRS-R:L, CPRS-R:L).

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Additional file 3:

Figure S2. Post-hoc comparisons of selected Conners' Parent Rating Scales (A, L, M, N).

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Additional file 4:

Figure S3. Post-hoc comparisons of selected Conners' Teacher Rating Scales (A, L, M, N).

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Additional file 5:

Figure S4. Histograms of the Strengths and Difficulties Questionnaire (SDQ) and the Social Communications Questionnaire (SCQ).

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Additional file 6:

Table S2. Quantiles and trimmed means with confidence intervals of the Strengths and Difficulties Questionnaire (SDQ) and the Social Communications Questionnaire (SCQ).

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Additional file 7:

Table S3. Quantiles and trimmed means with confidence intervals of intelligence measures.

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Additional file 8:

Figure S5. Post-hoc comparisons of the prorated IQ.

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