Self – perceived and clinically diagnosed dental and periodontal health status among young adults and their implications for epidemiological surveys

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).

ISSN: 1472-6831