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. Author manuscript; available in PMC: 2017 Nov 20.
Published in final edited form as: J Periodontol. 2009 Mar;80(3):436–446. doi: 10.1902/jop.2009.080480

Table 5.

Positive and Negative Predictive Values of Specific Thresholds of Selected Salivary Biomarkers and Plaque Biofilm Pathogens

Biomarker Threshold Above Threshold Periodontitis
PPV NPV
No (n) Yes (n)

MMP-8 (ng/ml) 87.0 28 12 0.69 0.70
+ 12 27

MMP-9 (ng/ml) 240.0 28 12 0.69 0.70
+ 12 27

Calprotectin (ng/ml) 3.6 25 15 0.62 0.63
+ 15 24

IL-6 (pg/ml) 22.4 24 16 0.59 0.60
+ 16 23

IL-1β (pg/ml) 235.8 22 18 0.54 0.55
+ 18 21

IL-10 (pg/ml) 520.9 22 18 0.54 0.55
+ 18 21

OPG (pg/ml) 2.0 17 22 0.43 0.44
+ 23 17

ICTP (ng/ml) 0.7 16 23 0.40 0.41
+ 24 16

T. denticola (%) 0.2 33 7 0.82 0.83
+ 7 32

T. forsythia (%) 0.1 32 8 0.80 0.80
+ 8 31

P. gingivalis (%) 0.1 31 8 0.78 0.80
+ 9 31

P. intermedia (%) 0.4 29 11 0.72 0.73
+ 11 28

C. rectus (%) 0.1 25 15 0.62 0.63
+ 15 24

F. nucleatum (%) 2.8 24 16 0.59 0.60
+ 16 23

E. corrodens (%) 0.0 35 31 0.62 0.53
+ 5 8

PPV = positive predictive value; NPV = negative predictive value; − = no; + = yes.