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Table 2 Comparison of the relative amounts of tested bacteria with DMFT index in the caries-active and caries-free groups by using Kruskal–Wallis and Mann–Whitney U tests

From: Correlation between dental caries experience and the level of Streptococcus mutans and lactobacilli in saliva and carious teeth in a Yemeni adult population

 Caries-activeCaries-freepCF salivaCA salivaCaries tissuep
MedianMedian
SM4.1 × 1064.9 × 1060.001*a4.44.6 × 1064.4 × 1060.006*b
LBs3.3 × 1063.5 × 1060.000*a3.33.2 × 1063.3 × 1060.001*b
DMFT8.000.000*a09.00.000*b
CF saliva   0.000*c0.000*c 
CA saliva   0.016*d1.000 
Carious tissue   0.004*e1.000 
 SMLBDMFT    
Decayed0.001*f0.000*f0.000*g    
Missing0.6200.2750.016*g    
Filled0.1740.1940.032*g    
  1. * p < 0.05, aSM, LBs, and DMFT score in caries-active and caries-free subjects; bSM, LBs, and DMFT score in the three types of samples (caries-free saliva, caries-active saliva, and carious tissue); cdifference between samples in relation to DMFT score; ddifference between samples in relation to SM and eto LBs, f, gdecayed, missing, and filled in relation to SM, LBs, and DMFT score