Table 2.

Perceived and normative assessment of dental health.

Normative Perceived	DMFT >8	DMFT 0–8	Total
Bad	TP 868	FP 409	1277
Good	FN 1664	TN 1979	3643
Total	2532	2388	4920

• TP = True Positive • FP = False Positive • FN = False Negative • TN = True Negative • Sensitivity (TP/(TP+FN)) = 0.34 (95%CI 0.32–0.36). • Specificity (TN/(TN+FP)) = 0.83 (95% CI 0.81–0/83). • Positive Predictive Value (TP/(TP+FP)) = 0.68 • Negative Predictive Value (TN/(TN+FN)) = 0.54 • Overall Proportions = 1277 participants (26%) reported having bad dental health status compared to 2532 (51.5%) clinically caries diagnosed subjects (McNemar test, p = <0.000001).