Table 1 The detection rate of 16S rRNA, 23S rRNA and 16S + 23S rRNA in dental biofilm and saliva samples, halitosis (BANA test) results and oral findings among study and control groups

Gastric H.pylori (−)

(n = 12, 17%)

Gastric H.pylori (+)

(n = 58, 83%)

No endoscopic examination

Saliva

16 S RNA (+)

10 (83.3%)

46 (79.3%)

14 (46.7%)^*

^a0.004

23 S RNA (+)

10 (83.3%)

55 (94.8%)

25 (83.3%)

^a0.167

16 S RNA+ 23 S RNA (+)

9 (75.0%)

44 (75.9%)

12 (40.0%)^*

^a0.003

Dental Biofilm

16 S RNA (+)

10 (83.3%)

49 (84.5%)

30 (100%)

^a0.070

23 S RNA (+)

10 (83.3%)

53 (91.4%)

5 (16.7%)^*

^a0.001

16 S RNA+ 23 S RNA (+)

8 (66.7%)

45 (77.6%)

5 (16.7%)^*

^a0.001

Halitosis

(BANA Test Results)

Negative

(n = 1, 8.3%)

(n = 4, 6.9%)

(n = 12, 40%)

^a0.001

Weak Positive

(n = 5, 41.7%)

(n = 34, 58.6%)

(n = 14, 46.7%)

Positive

(n = 6, 50%)

(n = 20, 34.5%)

(n = 4, 13.3%)^*

Oral Findings

DMFT

4.5 ± 4.86

5.31 ± 3.99^**

2.19 ± 2.14

^b0.001

DMFS

7.1 ± 4.7

7.62 ± 7.7^**

2.27 ± 2.16

^b0.001

dmft

4.67 ± 2.58

3 ± 2.79^**

7.41 ± 4.68

^b0.001

dmfs

9.5 ± 8.57

5.32 ± 5.38^**

15.59 ± 10.91

^b0.001

Gingival Index

0.42 ± 0.77

0.27 ± 0.49

0.04 ± 0.09

^b0.113

Plaque Index

0.63 ± 0.36^**

0.78 ± 0.62^**

0.34 ± 0,3

^b0.001

Salivary Flow Rate

5.04 ± 2.17

6.55 ± 2.83

5.85 ± 2.17

^c0.139

Saliva pH

7.4 ± 0.32

7.45 ± 0.34

7.61 ± 0.38

^c0.096