Table 3.

Transfer factor mean values and standard deviations of tobacco plants for each year at polluted and unpolluted sites.

Transfer Factors (mean ± standard deviation)	2011	2012	2014
polluted area	0.88 ± 0.38	1.10 ± 0.33	0.48 ± 0.39
unpolluted area without confounding data of Site 6, 11	0.55 ± 0.31	0.62 ± 0.36	0.52 ± 0.27
unpolluted area with data from Site 6 and 11 included	0.46 ± 0.32	0.51 ± 0.37	0.43 ± 0.28