OBJECTIVE: This study aimed to evaluate the association of serum zinc with periodontitis in non-diabetics based on smoking status, using a representative sample of adults in the United States. METHODS: A total of 1051 participants who underwent full-mouth periodontal examination and serum zinc testing were enrolled from NHANES 2011 to 2014. The covariate-adjusted association of serum zinc concentrations with periodontitis was explored using multivariable logistic regression, restricted cubic spines, and sensitivity analysis. RESULTS: The mean a...
