Table 3.

Changes in the prevalence of need for scaling according to health insurance coverage for dental scaling.

Classification		Before				After
		Total	N	Weighted (%)	p Value	Total	N	Weighted (%)	p Value
Total		10,802	7218	65.9		12,245	7611	60.9
Gender	Male	4569	3339	71.0	<0.001	5315	3613	66.7	<0.001
	Female	6233	3879	60.7		6930	3998	56.7
Age	20–64 years	8485	5508	64.7	<0.001	9410	5706	59.3	<0.001
	≥65 years	2317	1710	74.3		2835	1905	66.2
Region	Urban	8647	5559	63.4	<0.001	10,125	6049	58.6	<0.001
	Rural	2155	1659	75.7		2120	1562	73.2
Household income	1 (lowest)	1937	1434	72.3	<0.001	2203	1507	67.2	<0.001
	2	2771	1912	67.4		2986	1921	63.5
	3	3018	1937	64.0		3449	2083	58.9
	4 (highest)	3076	1935	62.9		3607	2100	57.0
Oral examination in the past year	No	8221	5719	68.8	<0.001	7770	5145	65.6	<0.001
	Yes	2581	1499	56.4		4475	2466	52.9
Tooth brushing frequency	<2	1241	971	78.2	<0.001	1072	771	71.5	<0.001
	≥2	9561	6247	64.3		11,173	6840	59.9
Smoking status	Past smoker/ Current non-smoker	8631	5577	63.0	<0.001	10,054	6004	58.4	<0.001
	Current smoker	2171	1641	73.9		2191	1607	72.7

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