Table 4 |
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|
Standardized incidence ratios (SIR) and rate ratio (RR) trends for lung cancer among cotton textile production unit workers by dust exposure category. |
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|
Exposure category |
Obs |
SIR |
95% CI |
RR |
95% CI |
χ2 test for trend |
|
|
||||||
|
Male |
||||||
|
None* (N = 2511) |
42 |
1.01 |
0.73–1.36 |
1 (reference) |
χ2 = 9.68;p = 0.02 |
|
|
Low (N = 656) |
10 |
1.91 |
0.92–3.51 |
1.89 |
0.85–3.85 |
|
|
Medium (N = 481) |
7 |
1.30 |
0.52–2.69 |
1.29 |
0.49–2.91 |
|
|
High (N = 529) |
4 |
0.77 |
0.21–1.96 |
0.76 |
0.20–2.10 |
|
|
Very high (N = 574) |
2 |
0.24 |
0.03–0.86 |
0.24 |
0.03–0.91 |
|
|
Female |
||||||
|
None (N = 2140) |
2 |
0.92 |
0.11–3.30 |
1 (reference) |
χ2 = 4.68;p = 0.20 |
|
|
Low (N = 1350) |
3 |
2.38 |
0.49–6.91 |
2.58 |
0.30–30.9 |
|
|
Medium (N = 1410) |
3 |
2.17 |
0.45–6.35 |
2.36 |
0.27–28.2 |
|
|
High (N = 1371) |
2 |
1.28 |
0.16–4.63 |
1.39 |
0.10–19.2 |
|
|
Very high (N = 1910) |
1 |
0.55 |
0.01–3.08 |
0.60 |
0.01–11.5 |
|
|
|
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|
None * – using the maintenance employment group as the reference category. |
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|
Kuzmickiene and Stukonis Journal of Occupational Medicine and Toxicology 2007 2:14 doi:10.1186/1745-6673-2-14 |
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