Table 4 Prevalence rate of silicon dust among workers with different smoking levels
Project | Smoking level | p-values | |||
|---|---|---|---|---|---|
often (819) | Never (523) | ||||
n | FEV1/FVC < 70% | n | FEV1/FVC < 70% | ||
Age (years) | |||||
< 40 | 237(28.9) | 3(1.3) | 120(22.9) | 0(0) | 0.22 |
40–49 | 302(36.9) | 6(2.0) | 250(47.8) | 2(0.8) | 0.25 |
50–65 | 280(34.2) | 4(1.4) | 153(29.3) | 5(3.3) | 0.20 |
p-values | 0.77 | 0.04 | |||
seniority(years) | |||||
≤ 5 | 108(13.2) | 1(0.9) | 58(11.1) | 0(0) | 0.46 |
6–15 | 304(37.1) | 2(0.66) | 173(33.1) | 1(0.6) | 0.92 |
16–30 | 206(25.2) | 3(2.1) | 170(32.5) | 2(1.2) | 0.81 |
>30 | 122(14.9) | 2(1.5) | 59(11.28) | 1(1.7) | 0.98 |
N= | 79(9.6) | 5(6.3) | 63(12.0) | 0(0) | |
p-values | 0.76 | 0.72 | |||
Exposure Level | |||||
Low | 495(60.4) | 4(0.8) | 346(66.2) | 0(0) | 0.09 |
High | 250(30.5) | 9(3.6) | 114(21.8) | 4(3.5) | 0.97 |
N= | 74(9.0) | 0(0) | 63(12.0) | 0(0) | |
p-values | 0.01 | 0.00 | |||
Pneumoconiosis or suspected pneumoconiosis | |||||
yes | 22(2.7) | 1(4.5) | 11(2.1) | 0(0) | 0.47 |
no | 797(97.3) | 12(1.5) | 512(97.9) | 4(0.8) | 0.24 |
P-values | 0.26 | 0.77 | |||