Table 4.
The comparison of total and specific mortality in black coal miners with the acknowledged coal-workers’ pneumoconiosis (CWP) and mortality of the general male population in the Czech Republic in the period 1992–2013 according to the severity of CWP.
| Cause of Death (ICD-10) | The Categories of Coal-Workers‘ Pneumoconiosis (CWP) | |||||||
|---|---|---|---|---|---|---|---|---|
| iCWP | sCWP | PMF | CWP & TBC | |||||
| (N = 606) | (N = 2465) | (N = 233) | (N = 172) | |||||
| ND | SMR (95% CI) | ND | SMR (95% CI) | ND | SMR (95% CI) | ND | SMR (95% CI) | |
| Total (A00–Y98) | 63 | 0.85 (0.65–1.09) | 653 | 1.01 (0.93–1.09) | 96 | 1.22 (0.99–1.49) | 77 | 2.00 *** (1.58–2.50) |
| Malignant neoplasms (C00–C97) | 18 | 0.75 (0.44–1.18) | 215 | 1.09 (0.95–1.25) | 33 | 1.60 * (1.10–2.25) | 18 | 1.70 * (1.01–2.68) |
| Malignant neoplasm of lung (C33–C34) | 3 | 0.43 (0.09–1.26) | 89 | 1.60 *** (1.29–1.98) | 14 | 2.74 ** (1.50–4.59) | 10 | 3.63 ** (1.74–6.66) |
| Diseases of the circulatory system (I00–I99) | 17 | 0.68 (0.4–1.10) | 259 | 0.86 * (0.76–0.97) | 33 | 0.77 (0.53–1.08) | 23 | 1.18 (0.75–1.77) |
| Diseases of the respiratory system (J00–J99) | 5 | 1.48 (0.48–3.45) | 78 | 2.22 *** (1.76–2.77) | 22 | 4.62 *** (2.89–6.99) | 17 | 8.02 *** (4.67–12.84) |
| Chronic obstructive pulmonary diseases (J44) | 2 | 1.77 (0.21–6.39) | 26 | 2.05 ** (1.34–3.00) | 11 | 6.59 *** (3.29–11.80) | 7 | 10.31 *** (4.14–21.21) |
| Coal-workers‘ pneumoconiosis (J60) | 1 | - | 25 | - | 6 | - | 5 | - |
| Diseases of the digestive system | 10 | 1.55 (0.74–2.85) | 39 | 1.18 (0.84–1.61) | 2 | 0.72 (0.09–2.61) | 5 | 2.68 (0.87–6.27) |
| Age—CWP 1 | 44.0 (9.0) | 59.2 (12.4) | 67.7(10.1) | 57.9 (14.7) | ||||
| Age at death (years) (mean, SD) | 54.6 (9.7) | 68.1 (11.1) | 73.4(9.7) | 64.9 (13.9) | ||||
| Exposure (years) (mean, SD) 2 | 21.3 (8.1) | 24.0 (8.9) | 25.3 (8.9) | 20.4 (8.6) | ||||
| Proportion of smokers/ex-smokers (%) 3 | 69.5% | 71.0% | 52.0% | 74.1% | ||||
* p < 0.05; ** p < 0.01; *** p < 0.001; 1 Age of coal miners with CWP at the time when they were compensated for the CWP; 2 data on exposure found in 85% of deaths; 3 data on smoking found in 68% of deaths; ICD = International Classification of Diseases; SMR = standardized mortality ratio; SD = standard deviation; N = number of persons; ND = number of deaths; iCWP = initial form of CWP; sCWP = simple CWP; PMF = progressive massive fibrosis; CWP & TBC = CWP with active tuberculosis.