The new injury surveillance system can be successfully used in ED and provides a valid mechanism for monitoring injuries. Refinements to reduce systematic coding errors might improve the validity and quality of the data. A larger sample is needed to assess the validity of the self-harm code.

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A review of the research methodologies used to evaluate the effectiveness of pedestrian education programs for children is presented in this paper.Since pedestrian injuries are one of the leading causes of morbidity and mortality among young children it is necessary to identify and evaluate intenentions which will reduce the incidence and severity of these injuries. There are, however, many methodological dimculties to be overcome by researchers attempting to establish the merit of such programs. For example, selection bias in school-based programs, lack of strict criteria for follow-up of all subjects, and an inability to control for confounding because relevant variables are not rigorously monitored are just some of the methodological limitations. This paper identifies a number of limitations and aspects of evaluation which are often omitted and suggests ways in which these problems may be addressed in future research. Asia Poc JPublic Health 1995; 8(1):42-7.