Table 2.

Changes in the prevalence of healthy periodontal tissues according to health insurance coverage for dental scaling.

Classification		Before				After
		Total	N	Weighted (%)	p Value	Total	N	Weighted (%)	p Value
Total		10,802	3584	34.2		12,245	4634	39.1
Gender	Male	4569	1230	29.0	<0.001	5315	1702	33.3	<0.001
	Female	6233	2354	39.3		6930	2932	43.3
Age	20–64 years	8485	2977	35.3	<0.001	9410	3704	40.7	<0.001
	≥65 years	2317	607	25.7		2835	930	33.8
Region	Urban	8647	3088	36.6	<0.001	10,125	4076	41.4	<0.001
	Rural	2155	496	24.3		2120	558	26.8
Household income	1 (lowest)	1937	503	27.7	<0.001	2203	696	32.9	<0.001
	2	2771	859	32.6		2986	1065	36.5
	3	3018	1081	36.0		3449	1366	41.2
	4 (highest)	3076	1141	37.1		3607	1507	43.0
Oral examination in the past year	No	8221	2502	31.2	<0.001	7770	2625	34.5	<0.001
	Yes	2581	1082	43.6		4475	2009	47.1
Tooth brushing frequency	<2	1241	270	21.8	<0.001	1072	301	28.5	<0.001
	≥2	9561	3314	35.7		11,173	4333	40.1
Smoking status	Past smoker/ Current non-smoker	8631	3054	37.0	<0.001	10,054	4050	41.6	<0.001
	Current smoker	2171	530	26.1		2191	584	27.3

The data were analyzed by Complex samples chi-square test.