Strengths and Difficulties Questionnaire Added Value Scores: evaluating effectiveness in child mental health interventions. BJP, 194, . The first equation on p. 554 should read:

\batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \[\ \mathrm{Raw}{\ }\mathrm{SDQ}{\ }\mathrm{Added}{\ }\mathrm{Value}{\ }\mathrm{Score}(\mathrm{in}{\ }\mathrm{SDQ}{\ }\mathrm{points})=2.3+0.8{\times}\mathrm{baseline}{\ }\mathrm{total}{\ }\mathrm{difficulties}{\ }\mathrm{score}+0.2{\times}\mathrm{baseline}{\ }\mathrm{impact}{\ }\mathrm{score}-0.3{\times}\mathrm{baseline}{\ }\mathrm{emotional}{\ }\mathrm{difficulties}{\ }\mathrm{subscale}{\ }\mathrm{score}-\mathrm{follow-up}{\ }\mathrm{total}{\ }\mathrm{difficulties}{\ }\mathrm{score}\ \] \end{document}

The online version of the paper has been corrected post-publication, in deviation from print and in accordance with this notice.

Prevalence of autism-spectrum conditions: UK school-based population study. BJP, 194, . The following should be included under ‘Funding’ (p. 508): This study was conducted in association with the NIHR CLAHRC for Cambridgeshire and Peterborough. Also, Patrick Bolton's affiliation is now MRC SGDP Centre, Institute of Psychiatry, London.