Table 3

Perceived and normative assessment of periodontal health.

Normative Perceived

CPITN 3–4

CPITN 0–2

Total

Bad

TP 46

FP 771

817

Good

FN 118

TN 3520

3638

Total

164

4291

4455

• TP = True Positive • FP = False Positive • FN = False Negative • TN = True Negative • Sensitivity (TP/(TP+FN)) = 0.28 (95%CI 0.21–0.35). • Specificity (TN/(TN+FP)) = 0.83 (95% CI 0.81–0/83). • Positive Predictive Value (TP/(TP+FP)) = 0.05 • Negative Predictive Value (TN/(TN+FN)) = 0.97 • Overall Proportions = 817 participants (18%) reported having bad periodontal health status compared to 164 (3.7%) clinically periodontal disease diagnosed subjects (McNemar test, p = <0.000001).

Vered and Sgan-Cohen BMC Oral Health 2003 3:3   doi:10.1186/1472-6831-3-3