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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Ann Epidemiol. 2013 Jun;23(6):334–341. doi: 10.1016/j.annepidem.2013.03.013

Table 4.

Association between employment status and subsequent asbestos exposure for 2975 individuals followed during 115,643 person-years between 1940 and 2001

Employment status Asbestos
exposure
 Total
person-years		 Exposure
prevalence (%)* 		95% CI†
Any None
At work 19,341 2564 21,905 88.3 87.0–89.5
Left work 0 93,738 93,738 0 –
Total person-years 19,341 96,302 115,643 16.7 15.9–17.6

CI = confidence interval.

*

Based on unlagged exposure values.

†

Confidence intervals estimated using robust variance.