TABLE 6.

Mesothelioma Risk for a Canadian Petroleum Cohort by Hire Period/Age

Time Period	Characteristics	Observed	Expected	SIR/SMR	95% CI
1964–2006	Total cohort	15	5.40	(SIR) 2.79	1.56–4.60
1964–1994†	Total cohort	x	1.32	—	—
1995–2006	Total cohort	11	4.12	(SIR) 2.67	1.40–4.64*
1964–2006	Age < 45	x	0.4	—	—
	Age 45–54	x	1.6	—	—
	Age 55–64	11	2.2	(SIR) 5.00	2.63–8.69*
	Age 65+	x	1.2	—	—
1999–2006	Total cohort	9	2.8	(SMR) 3.27	1.50–6.21
	Hire age < 25	x	0.7	—	—
	Hire age 25–35	5	1.0	(SMR) 4.89	1.59–11.41
	Hire age > 35	x	1.0	—	—

x Observations in the 1–4 observed range are not reported in accordance with disclosure rules of Statistics Canada.

95% CI, 95% confidence interval; SIR, standardized incidence ratio; SMR, standardized mortality ratio.

^*Calculated using Mid-P exact test.¹⁵

^†Reference.¹²