The present investigation set out to determine the sensitivity of injury classification according to body area and to study the specificity of “commotio cerebri”. It was preceded by several related essays on injury statistics. The sensitivity was at least 0.94 for all body areas except neck and back, for which areas the values were 2/3 (adults) and 4/5 (all age groups). The specificity analysis showed that about half of the “commotio cerebri” diagnoses were not based on incontestable facts; one-seventh of them had no clinical basis at all according to the records.
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