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Table 1 Sample demographics

From: Microbial differences between dental plaque and historic dental calculus are related to oral biofilm maturation stage

  Plaque Modern calculus Historic calculus
Source HMP This study This study
N 20 10 43
Periodontal disease*
 Yes 0 6 18
 No 20 4 25
 Caries*    
 Yes 0 10 8
 No 20 0 35
  1. *On the tooth/teeth sampled. Detailed sample metadata is presented in Additional file 2: Table S1