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EffiCiency and Safety of an eLectronic cigAreTte (ECLAT) as Tobacco Cigarettes Substitute: A Prospective 12-Month Randomized Control Design Study

Figure 7

Box plots representation of the changes in saliva cotinine levels measured at week-6 and at week-12 in those who stated they did not smoke and with an eCO≤7 ppm; no significant difference between groups A and B at both time points was found (Mann-Whitney U test).

Bars indicate (from the bottom to the top) 10th, 25th, 50th (median), 75th, and 90th percentiles. Values below 10th and above 90th percentiles (outliers) are shown as circles.

Figure 7

doi: https://doi.org/10.1371/journal.pone.0066317.g007