Table 4 Relative risk (RR) and confidence interval (CI) of laryngeal cancer by cumulative exposure (CE) to plant dust, smoking and alcohol consumption among Finns in 1971–95 adjusted by each other, age, social class and period, lag time 10 years.
| Agent/confounder | CE class | Men | Women | ||
|---|---|---|---|---|---|
| RR | 95% CI | RR | 95% CI | ||
| Plant dust | High (>40 mg/m3‐year) | 2.89 | 1.50–5.57 | 0 | 0 |
| Medium (10–40 mg/m3‐year) | 0.91 | 0.72–1.14 | 0.86 | 0.23–3.16 | |
| Low (<10 mg/m3‐year) | 1.03 | 0.82–1.30 | 0.65 | 0.36–1.21 | |
| None (reference) | 1.00 | (reference) | 1.00 | (reference) | |
| Smoking index | Effect of 10% increase in daily smoking prevalence of an occupation | 1.12 | 1.04–1.21 | 1.45 | 1.03–2.05 |
| Alcohol index | Effect of one additional drink/day | 1.31 | 1.06–1.61 | 1.65 | 0.25–10.8 |