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/confounderCE classMenWomen
RR95% CIRR95% CI
Plant dustHigh (>40 mg/m3-year)2.891.50–5.5700
Medium (10–40 mg/m3-year)0.910.72–1.140.860.23–3.16
Low (<10 mg/m3-year)1.030.82–1.300.650.36–1.21
None (reference)1.00(reference)1.00(reference)
Smoking indexEffect of 10% increase in daily smoking prevalence of an occupation1.121.04–1.211.451.03–2.05
Alcohol indexEffect of one additional drink/day1.311.06–1.611.650.25–10.8