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. Author manuscript; available in PMC: 2020 Aug 28.

Published in final edited form as: Tob Regul Sci. 2016 Apr 1;2(2):166–175. doi: 10.18001/trs.2.2.7

Table 4.

Metal concentration in tobacco (μg/g) by dominant manufacturer within US, UK, and Mexico.

		Ni				As				Cd				Pb
	Manufacturer	Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max
US	RJR	2.26^*^a	0.42	1.6	2.9	0.22^a	0.06	0.1	0.3	0.97^a	0.19	0.6	1.3	0.28^a	0.17	0.1	0.6
	PM	2.22^a	0.40	1.7	3.1	0.27^a	0.08	0.1	0.4	0.9^a	0.13	0.6	1.1	0.27^a	0.14	0.1	0.6
	Other	1.40^b	0.57	0.6	2.3	0.24^a	0.06	0.1	0.3	0.93^a	0.27	0.5	1.5	0.25^a	0.11	0.1	0.4
UK	Imperial	0.84^*^a	0.21	0.6	1.4	0.27^a	0.10	0.1	0.5	1.31^**^a	0.28	0.9	1.9	0.53^a	0.39	0.1	1.5
	JTI	0.79^a	0.22	0.6	1.2	0.23^a	0.09	0.1	0.4	1.03^a	0.22	0.8	1.4	0.25^a	0.15	0.1	0.5
	Other	1.41^b	0.59	0.5	2.7	0.19^a	0.10	0.1	0.4	1.04^a	0.52	0.2	2	0.31^a	0.15	0.2	0.6
MX	PMI	1.41^**^a	0.47	0.6	2.2	0.23^*^a	0.07	0.1	0.4	1.04^*^a	0.20	0.7	2	0.23^**	0.09	0.1	0.4
	BAT	0.98^b	0.27	0.6	1.4	0.41^b	0.07	0.3	0.5	1.97^b	0.48	0.7	3	0.31	0.22	0.1	0.8
	Other	1.43^ab	1.00	0.3	2.2	0.27^a	0.06	0.2	0.3	1.4^a	0.35	1.2	2	0.60		0.6	0.6

^*

Differences between metal concentration within that country is significant at the 0.05 level

^**

Differences between metal concentration within that country is significant at the 0.01 level

Letter superscripts are Bonferroni results for differences between manufacturers for each individual design feature and country