Table 3.

Subgroup analysis - Pooled prevalence of periodontal diseases.

Events			No. of studies	Total Sample (N)	No. participants with events (n)	Pooled Prevalence (%)	95% Confidence Intervals
							Lower limit	Upper Limit
Severity of Periodontitis
Mild to Moderate periodontitis		Female	9	28045	8111	16.7	4.2	34.4
		Male	9	31030	9192	17.8	5.8	33.8
		<35 years	13	18364	2511	23.3	15.5	32.2
		35–65 years	19	28971	7787	30.0	24.7	35.5
		>65 years	15	17153	5435	24.5	18.5	31.0
		Tribal	4	2599	722	20.9	10.5	33.5
		Rural	11	6387	1952	27.8	19.7	36.7
		Urban	1	216	49	22.7	17.3	28.5
		Unspecified	9	58938	13832	26.6	18.2	36.0
		Total	24	68140	16557	26.2	21.1	31.6
Severe periodontitis		Female	9	28045	3475	14.4	7.1	23.6
		Male	9	31030	4011	19.3	11.3	28.8
		<35 years	13	18364	1090	8.5	3.8	14.8
		35–65 years	19	28971	3532	21.4	14.5	29.2
		>65 years	15	17153	3612	32.7	23.7	42.5
		Tribal	4	2599	393	21.9	0	58.3
		Rural	11	6387	1410	17.4	7.6	29.9
		Urban	1	216	64	29.6	23.7	35.9
		Unspecified	9	58938	6999	20.0	13.9	26.8
		Total	24	68140	8867	19.0	14.3	24.2
Quality of studies
Gingivitis		High	18	63709	39919	48.3	39.4	57.3
		Moderate	3	2659	925	35	3.9	74.1
Mild to Moderate periodontitis		High	21	65481	15860	26.4	20.9	32.3
		Moderate	3	2659	697	2.2	0	4.1
Severe periodontitis		High	21	65481	7859	17	12.7	21.8
		Moderate	3	2659	1008	1.6	0	5.3
Measures of periodontal disease
Gingivitis		CPI	7	35494	20344	47.1	33.7	60.7
		CPITN	14	30874	20499	46.3	31.4	61.5
Mild to Moderate periodontitis		CPI	9	36266	10620	26.9	21.7	32.4
		CPITN	15	31874	5935	25.6	18.2	33.7
Severe periodontitis		CPI	9	36266	5257	24.2	12.5	38.1
		CPITN	15	31874	3609	15.7	9.1	23.5