Skip to main content

Table 1 Relative risk (RR) for the use of C1 coal

From: Nanoquartz in Late Permian C1 coal and the high incidence of female lung cancer in the Pearl River Origin area: a retrospective cohort study

Expected RR Required person-years
1.5 466,000
2.0 134,000
3.0 42,000
5.0 15,000