Research Article
Underground Coal Mining: Relationship between Coal Dust Levels and Pneumoconiosis, in Two Regions of Colombia, 2014
Table 1
Population and sample distribution by department.
| | Department | Population | Sample |
Number of
employers | Number of
workers | Number of
employers | Number of
workers |
| | Boyacá | 305 | 8667 | 18 | 232 | | Cundinamarca | 161 | 5711 | 11 | 215 | | Total | 466 | 14378 | 29 | 447 |
|
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