Factors | QFT test | Prevalence ratio (95% CI) | p-value | |
---|---|---|---|---|
Negative | Positive | |||
80(33.1%) | 162(66.9%) | |||
Socio-demographic characteristics | ||||
Age (years) | ||||
< 60 | 9(45.0%) | 11(55.0%) | 1 | – |
60- | 43(34.4%) | 82(65.6%) | 1.19(0.79–1.81) | 0.407 |
≥ 70 | 28(28.9%) | 69(71.1%) | 1.29(0.85–1.96) | 0.226 |
BMI (kg/m2) a | ||||
18.5- | 35(36.1%) | 62(63.9%) | 1 | – |
≥ 25 | 44(30.6%) | 100(69.4%) | 1.09(0.90–1.31) | 0.379 |
Highest education level | ||||
Primary school or lower | 43(35.5%) | 78(64.5%) | 1 | – |
Middle school | 28(29.5%) | 67(70.5%) | 1.09(0.91–1.32) | 0.342 |
High school | 9(39.1%) | 17(73.9%) | 1.01(0.74–1.38) | 0.928 |
Marital status | ||||
Married | 73(32.0%) | 155(68.0%) | 1 | – |
Divorced or Widowed | 7(50.0%) | 7(50.0%) | 0.73(0.43–1.25) | 0.257 |
Personal income per month (RMB) | ||||
< 3000 | 7(24.1%) | 22(75.9%) | 1 | – |
3000- | 60(34.1%) | 116(65.9%) | 0.87(0.69–1.09) | 0.233 |
≥ 4000 | 13(35.1%) | 24(64.9%) | 0.86(0.62–1.17) | 0.323 |
Family income per head per month (RMB) a | ||||
< 6000 | 45(33.3%) | 90(66.7%) | 1 | – |
6000- | 16(32.7%) | 33(67.3%) | 1.01(0.80–1.27) | 0.931 |
≥ 10,000 | 5(27.8%) | 13(72.2%) | 1.08(0.79–1.48) | 0.613 |
Place of birth | ||||
City | 7(30.4%) | 16(69.6%) | 1 | – |
Countryside | 73(33.3%) | 146(66.7%) | 0.96(0.72–1.28) | 0.771 |
Occupational factors | ||||
Stages of CWP | ||||
I | 62(31.3%) | 136(68.7%) | 1.00 | – |
II | 16(39.0%) | 25(61.0%) | 0.89(0.68–1.15) | 0.374 |
III | 2(66.7%) | 1(33.3%) | 0.48(0.10–2.41) | 0.377 |
Job category | ||||
Transport and helping | 9(60.0%) | 6(40.0%) | 1.00 | – |
Mining | 31(36.5%) | 54(63.5%) | 1.59(0.84–3.01) | 0.157 |
Tunneling | 16(25.4%) | 47(74.6%) | 1.87(0.10–3.52) | 0.055 |
Both tunneling and mining | 24(30.4%) | 55(69.6%) | 1.74(0.92–3.29) | 0.088 |
Years of work | ||||
10- | 4(40%) | 6(60.0%) | 1.00 | – |
20- | 21(27.6%) | 55(72.4%) | 1.21(0.71–2.04) | 0.484 |
30- | 47(33.3%) | 94(66.7%) | 1.11(0.66–1.87) | 0.691 |
40- | 8(53.3%) | 7(46.7%) | 0.78(0.37–1.63) | 0.506 |
Dust exposure period | ||||
1940- | 13(40.6%) | 19(59.4%) | 1.00 | – |
1960- | 47(29.9%) | 110(70.1%) | 1.18(0.87–1.60) | 0.286 |
1980- | 20(37.7%) | 33(62.3%) | 1.05(0.74–1.50) | 0.793 |
Age at first dust exposure | ||||
< 18 | 9(33.3%) | 18(66.7%) | 1.00 | – |
18–29 | 63(32.8%) | 129(67.2%) | 1.01(0.76~ 1.34) | 0.286 |
≥ 30 | 8(34.8%) | 15(65.2%) | 0.98(0.66~ 1.46) | 0.793 |
Duration of dust exposure(years) | ||||
< 10 | 1(14.3%) | 6(85.7%) | 1.00 | – |
10- | 21(38.9%) | 33(61.1%) | 0.71(0.49–1.03) | 0.073 |
20- | 33(34.4%) | 63(65.6%) | 0.77(0.55~ 1.07) | 0.119 |
30- | 25(29.4%) | 60(70.6%) | 0.82(0.59–1.15) | 0.252 |
Environmental factors | ||||
Workplace ventilation | ||||
Well | 46(41.1%) | 66(58.9%) | 1.00 | – |
Poor | 34(26.2%) | 96(73.8%) | 1.25(1.04–1.51) | 0.017 |
Accommodation | ||||
Building | 36(32.1%) | 76(67.9%) | 1.00 | – |
Bungalow | 44(33.8%) | 86(66.2%) | 0.98(0.82–1.16) | 0.779 |
Living spaceb | ||||
< 20 | 21(29.2%) | 51(70.8%) | 1.00 | – |
20–40 | 35(34.0%) | 68(66.0%) | 0.93(0.761–1.142) | 0.497 |
40- | 6(23.1%) | 20(76.9%) | 1.10(0.873–1.381) | 0.424 |
Behavioral factors | ||||
Smoking | ||||
Never | 12(34.3%) | 23(65.7%) | 1.00 | – |
Once | 45(38.5%) | 72(61.5%) | 0.94(0.71–1.24) | 0.497 |
Occasionally | 4(66.7%) | 2(33.3%) | 0.51(0.16–1.61) | 0.424 |
Frequently | 19(22.6%) | 65(77.4%) | 1.18(0.90–1.54) | 0.424 |
Start smoking age | ||||
< 18 | 14(31.8%) | 30(68.2%) | 1.00 | – |
≥ 18 | 51(32.3%) | 107(67.7%) | 0.99(0.79–1.25) | 0.954 |
Smoking indexc | ||||
0 | 12(34.3) | 23(65.7) | 1 | – |
> 0 | 21(36.2) | 37(63.8) | 0.99(0.73–1.35) | 0.954 |
15- | 21(29.6) | 50(70.4) | 1.09(0.82–1.44) | 0.566 |
30- | 23(31.9) | 49(68.1) | 1.05(0.79–1.40) | 0.741 |
Smoking years | ||||
< 10 | 7(58.3%) | 5(41.7%) | 1.00 | – |
10- | 17(34.0%) | 33(66.0%) | 1.58(0.79–3.19) | 0.197 |
≥ 30 | 40(29.0%) | 98(71.0%) | 1.70(0.87–3.36) | 0.123 |
Drinking | ||||
Never | 19(27.9%) | 49(72.1%) | 1.00 | – |
Once | 16(35.6%) | 29(64.4%) | 0.89(0.69–1.16) | 0.405 |
Occasionally | 13(30.2%) | 30(69.8%) | 0.97(0.76–1.24) | 0.797 |
Frequently | 32(37.2%) | 54(62.8%) | 0.87(0.70–1.09) | 0.220 |
Drinking indexd | ||||
0 | 32(32.3) | 67(67.7) | 1 | – |
1- | 10(28.6) | 25(71.4) | 1.05(0.82–1.36) | 0.672 |
50- | 15(30.6) | 34(69.4) | 1.02(0.81–1.29) | 0.832 |
100- | 19(39.6) | 29(60.4) | 0.89(0.68–1.16) | 0.404 |
Days of every week of intake of fruits | ||||
< 1 | 7(18.4%) | 31(81.6%) | 1.00 | – |
1–3 | 27(35.5%) | 49(64.5%) | 0.79(0.63–0.99) | 0.041 |
≥ 4 | 34(35.8%) | 61(64.2%) | 0.79(0.64–0.97) | 0.028 |
Days of every week of physical exercise | ||||
< 1 | 2(40.0%) | 3(60.0%) | 1.00 | – |
1- | 11(28.9%) | 27(71.1%) | 1.18(0.56–2.49) | 0.656 |
7 | 60(33.3%) | 120(66.7%) | 1.11(0.54–2.29) | 0.775 |
Length of sleeping (hour) | ||||
< 6 | 24(36.9%) | 41(63.1%) | 1.00 | – |
6- | 34(29.8%) | 80(70.2%) | 1.11(0.89–1.39) | 0.345 |
≥ 8 | 22(34.9%) | 41(65.1%) | 1.03(0.80–1.34) | 0.813 |
History of BCG vaccination | ||||
No | 72(33.2%) | 145(66.8%) | 1.00 | – |
Yes | 8(32.0%) | 17(68.0%) | 1.02(0.77–1.35) | 0.904 |
The family history of tuberculosis | ||||
No | 78(33.5%) | 155(66.5%) | 1.00 | – |
Yes | 2(22.2%) | 7(77.8%) | 1.17(0.82–1.68) | 0.396 |
Exposure history of tuberculosis | ||||
No | 77(33.8%) | 151(66.2%) | 1.00 | – |
Yes | 3(21.4%) | 11(78.6%) | 1.19(0.89–1.58) | 0.246 |