Table 2 Subgroup analysis of general characteristics of workers exposed to silica dust with and without obstructive pulmonary ventilation dysfunction (FEV1/FVC < 70%)
n = 2064 | silicious dust FEV1/FVC < 70% | p-values | ||
|---|---|---|---|---|
Yes(n = 47) | No(n = 2017) | |||
Age (years) | 44.9 ± 8.1 | 47.0 ± 8.7 | 44.9 ± 8.1 | 0.08 |
seniority | 16.7 ± 10.1 | 18.0 ± 12.1 | 16.64 ± 10.1 | 0.59 |
gender | ||||
Male | 1746(84.6) | 30(1.7) | 1716(98.3) | |
female | 318(15.4) | 17(5.3) | 301(94.7) | 0.00 |
Pneumoconiosis or suspected pneumoconiosis | ||||
yes | 41(2.0) | 1(2.4) | 40(97.6) | |
no | 2023(98.0) | 46(2.3) | 1977(97.7) | 0.94 |
Exposure Level | ||||
High | 465(22.5) | 38(8.2) | 427(91.8) | |
Low | 1003(48.6) | 9(0.9) | 994(99.1) | 0.00 |
N= | 596(28.9) | 0(0) | 596(100.0) | |
Smoking or not | ||||
Never | 523(25.3) | 4(0.8) | 519(99.2) | |
often | 819(39.7) | 13(1.6) | 806(98.4) | 0.20 |
N= | 722(35.0) | 30(4.2) | 692(95.8) | |