Adaptation and content validity of a battery of questionnaires for identifying occupational conditions among Chilean artisanal and small-scale miners.

Introduction: Small-scale and artisanal mining are historical activities in Chile that are deeply rooted in the region and economically significant. However, their workers face high levels of exposure to occupational hazards in informal conditions, with no adapted tools for occupational health surveillance. The available instruments are designed for formal companies and do not consider the operational context of artisanal miners.

Objective: To adapt and validate the content of a battery of questionnaires designed to identify working conditions affecting artisanal and small-scale mining workers in Chile.

Methods: An instrumental study was conducted in four phases: document review of national and international protocols; participatory risk identification with union leaders; development of thematic questionnaires; content validation through the judgment of 25 experts in occupational health, mining, psychometrics, and statistics. One hundred and fifty-five items were evaluated according to criteria of clarity, relevance, sufficiency, and coherence, using Aiken's V coefficient (threshold ≥ 0.80).

Results: 87% of the items met the threshold in all four criteria. Aiken's scores ranged from 0.77 to 0.98. The diesel exposure module obtained the highest scores, while the working conditions module showed less clarity (0.77), justifying the modification or elimination of 41% of its items. A new questionnaire on exposure to chemical agents was created by integrating modules. As a result of the adjustment process, the final battery consisted of six thematic questionnaires.

Conclusions: This is the first questionnaire set with favorable content validity to assess working conditions in Chilean artisanal mining, a sector with high labor informality. It represents an initial validation step. Further studies should evaluate reliability, construct validity, and field applicability.