Activities aimed at preventing minor occupational injuries in the construction sector should be orientated towards these mechanisms, especially projection of fragments despite the low frequency of this mechanism compared with that of other mechanisms. Case-control design is a useful alternative approach for research into occupational injuries.

The excessive risk of occupational accident injuries found in some Autonomous Communities can be explained, after partially ruling out the differences in the business activities and type of contract, either in terms of differences in the reporting of the occupational accident injuries and/or of the population at risk, or rather, in terms of differences in the working conditions at the companies in these Autonomous communities, which is the most plausible hypothesis. These differences must be studied further in greater detail.