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Fig. 2 | Harm Reduction Journal

Fig. 2

From: Underreporting of non-study cigarette use by study participants confounds the interpretation of results from ambulatory clinical trial of reduced nicotine cigarettes

Fig. 2

Mean self-reported and estimated total CPD during week 6. Self-reported Total CPD from Donny et al. [3]; underreported non-study CPD = biochemically estimated minus self-reported non-study CPD from Table 2; Mean estimated total CPD = mean total self-reported CPD plus mean underreported non-study CPD. *significantly higher total CPD than the control 15.8 mg/g group (p < 0.05)

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Harm Reduction Journal

ISSN: 1477-7517