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Table 4 Median (interquartile range) relative counts (% total bacteria) of the test species/genera in subgingival plaque from the healthy and periodontitis sites

From: Subgingival periodontal pathogens associated with chronic periodontitis in Yemenis

Species

Healthy sites (n = 20)

Periodontitis sites (n = 20)

Fold difference

P

A. actinomycetemcomitans

0.001 (0.000-0.020)

0.001 (0.000-0.005)

0.07

0.12

Fusobacterium spp.

0.789 (0.238-1.205)

0.701 (0.250-1.029)

0.81

0.79

Prevotella spp.

0.360 (0.222-0.903)

0.394 (0.228-0.751)

1.23

0.50

P. micra

0.009 (0.003-0.022)

0.031 (0.014-0.081)

3.39

0.0001*

P. gingivalis

0.004 (0.0001-0.0611)

0.068 (0.0001-0.219)

1.97

0.156

T. forsythia

0.302 (0.055-0.541)

0.425 (0.170-1.50)

0.86

0.08

T. denticola

0.092 (0.007-0.438)

0.338 (0.126-0.613)

1.33

0.006*

  1. *Statistically significant after adjustment for multiple comparisons (P ≤ 0.0063); Wilcoxon signed ranks test.