Table 5. Mesothelioma: Underlying cause of death SMRs^a 1999–2011^b in the Libby, Montana Mortality Study 1979–2011.

	All cases			Non-worker cases
	Total (n=366)	Males	Females	Total (n=333)	Males	Females
Observed	5	4	1	1	0	1
Expectedc	1.79	1.49	0.79	2.94	2.15	0.79
SMR	2.79	2.68	1.26	0.34	0.00	1.26
CId	0.90–6.52	0.72–6.85	0.02–7.03	0.00–1.89	–	0.02–7.03

^aSMRs standardized for age. Statistically significant results in bold.

^bNo mesothelioma cases were analyzed between 1979 and 1998.

^cExpected values rounded to second decimal point, hand calculations may not yield SMR results to the same level of accuracy that is presented here.

^d95% confidence interval.