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Table 1 Demographic characteristics of the subjects

From: The usefulness of biotyping in the determination of selected pathogenicity determinants in Streptococcus mutans

Outcome variable Mean ± SD in group P
ECC (n = 61) CF (n = 29)
Age (yr) 6 ± 1.9 6 ± 1,5 0.37a
Sex, number    0.75b
 Female number % 31 (51) 12 (41)  
 Male number % 30 (49) 17 (59)
Caries status dmftc score 6.5 ± 2.5 0  
  1. ECC: early childhood caries; CF: caries free.
  2. aBy the nonparametric Mann–Whitney U test for independent samples.
  3. bBy the Fisher’s exact test.
  4. cdmft, decayed, missing, and filled teeth.