In the early employment category (1950–1979), there was a clear trend that the longer the latency, the more significant the risk: five incident cases of MPM were observed 20 to 30 years since first employment (SIR = 3.65, 95% CI: 1.19 to 8.52), and 11 cases were observed 30 years since first employment (SIR = 4.52, 95% CI: 2.25 to 8.09).
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Increased Standardised Incidence Ratio of Malignant Pleural Mesothelioma in Taiwanese Asbestos Workers: A 29-Year Retrospective Cohort Study.
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The sentences
The incidences of Hodgkin's lymphoma (SIR = 1.32, 95% CI 0.27 to 3.87, n = 3) and MPM (SIR = 1.67, 95% CI 0.04 to 9.29, n = 1) both exceeded expectations, but since these results were only based on a few cases, they did not reach statistical significance.