Table 1.
General characteristics of the patients included in the study.
| All (n = 367) | Exposed (n = 59) | Simple silicosis (n = 129) | Complicated silicosis (n:149) | p | |
|---|---|---|---|---|---|
| Age; average (SD) | 50.4 (11.2) | 46.2 (13.6) | 49.7 (9.8) | 52.6 (10.7) | 0.001** |
| Smoking | |||||
| Active smoker | 79 (23.5) | 24 (40.7) | 35 (27.3) | 20 (13.4) | 0.001** |
| Former smoker | 157 (46.7) | 18 (30.5) | 56 (43.8) | 83 (55.7) | |
| Non-smoker | 100 (29.8) | 17 (28.8) | 37 (28.9) | 46 (30.9) | |
| BMI; average (SD) | 27.9 (4.0) | 29.9 (4.9) | 28.4 (3.6) | 26.8 (3.7) | < 0.001** |
| COPD | 67 (20.0) | 2 (3.4) | 18 (14.1) | 47 (31.8) | < 0.001** |
| Asthma | 31 (9.3) | 8 (14.0) | 16 (12.6) | 7 (4.7) | 0.032* |
| Charlson Index; average (SD) | 0.98 (1.4) | 0.74 (1.4) | 0.86 (1.4) | 1.18 (1.4) | 0.062 |
| Duration of exposure | 24.1 (9.4) | 21.2 (9.2) | 25.5 (9.3) | 23.9 (9.5) | 0.031* |
| Work | |||||
| Quarry | 274 (74.7%) | 38 (64.4%) | 105 (82.0%) | 131 (87.9%) | < 0.001* |
| Construction | 40 (10.9%) | 18 (30.5%) | 12 (9.4%) | 10 (6.7%) | |
| Others | 22 (6.5%) | 3 (5.1%) | 11 (8.6%) | 8 (5.4%) | |
| PH | 16 (4.8%) | 0 | 1 (0.8%) | 15 (10.1%) | < 0.001** |
| SARD | 40 (11.9%) | 6 (10.2%) | 17 (13.2%) | 17 (11.4%) | 0.817 |
| Tuberculosis | 54 (16.3%) | 1 (1.8%) | 21 (16.7%) | 32 (21.5%) | 0.003* |
| Death | 65 (19.3%) | 4 (6.8%) | 13 (10.2%) | 48 (32.2%) | < 0.001** |
BMI body mass index, PH pulmonary hypertension, SARD systemic autoimmune rheumatic disese, COPD chronic obstructive pulmonary disease.
Statistical significance was determined using χ2 test and ANOVA test for qualitative and continuous variables, respectively.
*p < 0.05; **p < 0.001.