... group of scientists (including Phyllis F. Agran, Diane G. Winn, Craig L. Anderson, Cecile Tran and Celeste P. Del Valle) designed a case-control study for Latino children in southern California aged between 1 to 14 years old. The purpose of this study is to identify environmental risk factors on residential neighbourhood streets for paediatric injuries. Factors which were taken into account embrace the number parked vehicle on road, pedestrian presents, car speed and traffic volume. Although this study provides a very detailed and valued information on childhood pedestrian injuries, it is limited to the investigation on the cases occurring on the street in front of the child's residence which would not be appropriate to represent the overall condition in neighbourhood. In the section titled "Method", a very detailed description of the process in regards of the case-control is provided. There are careful explanation of the reason why certain amount of ...

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