Figure 1.
Salivary cotinine concentrations (mean ± S.D.) in validated current smokers and current non-smokers with chronic periodontitis and aggressive periodontitis.
Non-detectable cotinine concentrations were entered as 0.0 ng ml-1.
*** p < 0.001.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.