Table 3.

Distribution of subjects who have “remaining teeth more than 20 teeth” by study variables (Chi-squared test).

Variable	Male(N = 2347)			Female (N = 3036)
	N*	%**	P	N*	%**	P
Regular life rhythm
Yes	2174	35.1%	0.922	2815	35.4%	0.657
No	173	34.7%		221	33.9%
Regular sleep
Yes	1882	35.8%	0.132	2228	35.3%	0.979
No	465	32.0%		808	35.3%
Regular physical activity
Yes	1244	35.9%	0.371	1400	36.4%	0.264
No	1103	34.1%		1636	34.4%
Current smoking
No	2068	36.0%	0.005	2958	35.6%	<0.001
Yes	279	27.6%		78	24.4%
Drinking alcohol
No	1316	32.9%	0.014	2608	35.1%	0.521
Yes	1031	37.7%		428
Feeling stress
No	441	32.4%	0.204	490	30.8%	0.023
Yes	1906	35.6%		2546	36.2%
Observation of teeth and/or gum
Yes	989	40.2%	<0.001	1461	40.8%	<0.001
No	1358	31.2%		1575	30.2%
Using interdental tools
Yes	864	45.9%	<0.001	1284	48.6%	<0.001
No	1483	28.7%		1752	25.6%
Enough time for tooth brushing
Yes	1029	40.1%	<0.001	1334	40.0%	<0.001
No	1318	31.0%		1702	31.7%
Being choked
No	1760	35.3%	0.577	2280	36.0%	0.161
Yes	587	34.1%		756	33.2%
Feeling mouth dry
No	1522	35.9%	0.240	1776	36.5%	0.091
Yes	825	33.5%		1260	33.6%
Deviated food habit
No	1888	36.4%	0.005	2438	36.5%	0.004
Yes	459	29.4%		598	30.3%
Chewing before swallowing
More than 30 times	456	37.7%	0.178	584	35.6%	0.862
Fewer than 30 times	1891	34.4%		2452	35.2%

 *N: total number of subjects corresponding to each answer.

 **%: the percentage of subjects who have “more than 20 teeth” corresponding to each answer.