highly significantp = 0.003
Correlations between saliva cotinine levels and number of cartridges/day were highly significant for study groups A and B (Rho = 0.93 for group A, p = 0.003; Rho = 0.95 for group B, p = 0.0004).
Correlations between saliva cotinine levels and number of cartridges/day were highly significant for study groups A and B (Rho = 0.93 for group A, p = 0.003; Rho = 0.95 for group B, p = 0.0004).