Table 4.
RRs for lung cancer and lifetime exposure-days to carbofuran, by smoking status in the AHS (1993–1997).
| Former smokers
|
Current smokers
|
|||
|---|---|---|---|---|
| Lifetime exposure daysa | Cases (n) | RR (95% CI) | Cases (n) | RR (95% CI) |
| > 0–9 | 3 | 1.0 | 3 | 1.0 |
| 10–39 | 3 | 1.87 (0.42–8.37) | 4 | 1.75 (0.39–7.90) |
| > 39 | 11 | 4.88 (1.36–17.52) | 6 | 2.49 (0.62–10.00) |
| Trendb | < 0.01 | 0.23 | ||
| p for interaction | 0.36 | |||
Rate ratios adjusted for age, smoking (never, < 14 pack-years, ≥ 14 pack-years), family history of cancer, exposure to trichlorofon and permethrin.
a
Years of use × days of use per year.
b
p-Value for trend test.