Table 3.
The comparison of total and specific mortality in black coal miners with and without the acknowledged coal-workers´ pneumoconiosis (CWP), and mortality of the general male population in the Czech Republic in the period 1992–2013.
| Cohorts | Coal Miners with CWP | Coal Miners without CWP | ||||
|---|---|---|---|---|---|---|
| Cause of Death (ICD-10) | (N = 3476) | (N = 6687) | ||||
| ND | SMR | 95% CI | ND | SMR | 95% CI | |
| Total (A00–Y98) | 889 | 1.10 ** | 1.02–1.17 | 1320 | 0.86 *** | 0.82–0.91 |
| Malignant neoplasms (C00–C97) | 284 | 1.16 * | 1.03–1.30 | 437 | 0.80 *** | 0.73–0.88 |
| Malignant neoplasm of lung (C33–C34) | 116 | 1.70 *** | 1.41–2.04 | 143 | 0.83 *** | 0.70–0.98 |
| Diseases of the circulatory system (I00–I99) | 332 | 0.88 * | 0.80–0.99 | 473 | 0.74 *** | 0.77–0.92 |
| Diseases of the respiratory system (J00–J99) | 122 | 2.78 *** | 2.32–3.31 | 77 | 1.08 | 0.85–1.35 |
| Chronic obstructive pulmonary diseases (J44) | 46 | 2.94 *** | 2.15–3.92 | 22 | 0.82 | 0.51–1.23 |
| Coal-workers´ pneumoconiosis (J60) | 37 | - | - | 14 | - | - |
| Diseases of the digestive system (K00–K93) | 56 | 1.30 | 0.98–1.69 | 126 | 1.12 | 0.93–1.33 |
| Age at study entry (years) (mean, SD) 1 | 58.9 (13.1) | 47.3 (5.50) | ||||
| Age at death (years) (mean, SD) | 67.4 (11.8) | 59.9 (8.0) | ||||
| Exposure (years) (mean, SD) 2 | 23.6 (8.9) | 25.5 (5.6) | ||||
| Proportion of smokers and ex-smokers (%) 3 | 68.9% | 79.4% | ||||
* p < 0.05; ** p < 0.01; *** p < 0.001, 1 Age of coal miners without CWP in the year 1992 or at cessation of work in mine, 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 in the coal miners with CWP and 99.9% in the coal miners without CWP; 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.