Table 4 Observed (Obs) and expected (Exp) numbers of cancer cases (all sites, lung and nasal cancer) and standardised incidence ratios (SIR) with 95% CI during 1967–2011 among workers in the Kokkola cobalt plant during 1969–2013with employment of >1 year, by exposure group
From: Cancer incidence among Finnish male cobalt production workers in 1969–2013: a cohort study
Exposure group | All sites | Lung, trachea | Tongue | Bladder | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Obs | Exp | SIR | 95% CI | Obs | Exp | SIR | 95% CI | Obs | Exp | SIR | 95% CI | Obs | Exp | SIR | 95% CI | |
Variable | 7 | 5.02 | 1.39 | 0.56–2.87 | - | 0.55 | 0.00 | 0.00–6.68 | 1 | 0.04 | 26.4 | 0.67–14.0 | - | 0.25 | 0.00 | 0.00–15.0 |
Low | 42 | 37.8 | 1.11 | 0.80–1.50 | 2 | 4.89 | 0.41 | 0.05–1.47 | 1 | 0.15 | 6.48 | 0.16–36.1 | 6 | 1.96 | 3.07 | 1.12–6.67 |
Moderate | 4 | 6.02 | 0.66 | 0.18–1.70 | - | 0.66 | 0.00 | 0.00–5.56 | - | 0.06 | 0.00 | 0.00 | - | 0.30 | 0.00 | 0.00–12.2 |
High | 39 | 43.6 | 0.90 | 0.64–1.22 | 4 | 5.95 | 0.67 | 0.18–1.72 | 1 | 0.16 | 6.12 | 0.15–34.1 | 3 | 2.32 | 1.30 | 0.27–3.78 |
Total | 92 | 91.9 | 1.00 | 0.81–1.22 | 6 | 12.0 | 0.50 | 0.18–1.08 | 3 | 0.41 | 7.39 | 1.52–21.6 | 9 | 4.79 | 1.88 | 0.86–3.56 |