Punto de corte óptimo de la concentración de cotinina en saliva para discriminar entre fumadores y no fumadores en la población adulta de Barcelona

The optimal cut-point to discriminate smoking status in the adult population is 9.2 ng/ml, with sensitivities and specificities around 90%. The cut-point was higher in men and in younger people. The cut-point increases with higher prevalence of daily smokers.