Table 3: Accuracy of PMPE protocols in estimating periodontitis prevalence according to half-reduced CDC/AAP case definition in NHANES sample.

	Periodontitis prevalence (%)		Absolute bias (%)		Relative bias (%)		Inflation factor (%)
	Moderate PD (SE)	Severe PD (SE)	Moderate PD	Severe PD	Moderate PD	Severe PD	Moderate PD	Severe PD
FMPE^*	37.0 (0.8)	13.4 (0.6)	Ref	Ref	Ref	Ref	Ref	Ref
Full-mouth PMPEs^†
CPI	42.1 (0.9)	13.3 (0.6)	5.1	-0.1	13.8	-0.7	87.9	100.8
MB-DB	39.5 (0.9)	11.1 (0.6)	2.5	-2.3	6.8	-17.2	93.7	120.7
MB-DL	42.9 (0.9)	13.2 (0.6)	5.9	-0.2	15.9	-1.5	86.2	101.5
Half-mouth PMPEs^†
4 sites	41.2 (0.9)	12.3 (0.6)	4.2	-1.1	11.4	-8.2	89.8	108.9

PD = Periodontitis

Negative and positive biases mean underestimation and overestimation of periodontitis prevalence, respectively

^*: CDC/AAP case definition

^†: Half-reduced CDC/AAP case definition