Underground Coal Mining: Relationship between Coal Dust Levels and Pneumoconiosis, in Two Regions of Colombia, 2014

Table 4

Relationship between coal dust (bituminous coal) and silica concentration risk levels and pneumoconiosis by department.

	Cundinamarca		Boyacá
	Number	%
Coal scale
Low	4	26.7%	1	11.1%
Medium	10	76.9%	0	0.0%
High	37	43.0%	41	27.9%
Severe	29	43.9%	19	44.2%
Total	80	44.4%	61	29.3%
Silica scale
Low	11	31.4%	8	34.8%
Medium	12	50.0%	0	0.0%
High	6	50.0%	3	15.8%
Severe	42	45.2%	20	21.3%
Critical	20	39.2%	38	41.8%
Total	91	42.3%	69	29.9%