Table 2. General Characteristics.

	Slip or Fall Down
	Ground			Toilet			Stair
	No	Yes	P-value	No	Yes	P-value	No	Yes	P-value
Number (n)	56,079	5,617		61,300	396		57,136	4,560
Number (%)	90.9	9.1		99.4	0.6		92.6	7.4
Age (year)	14.97	14.67	<0.001*	14.95	14.64	0.001*	14.97	14.7	<0.001*
Sleep Time (h) (%)			0.111			0.006*			<0.001*
<5.5h (n)	13,427	1,241		14,553	115		13,386	1,282
(%)	91.5	8.5		99.2	0.8		91.3	8.7
5.5≤,<6.5h (n)	13,477	1,412		14,790	99		13,784	1,105
(%)	90.5	9.5		99.3	0.7		92.6	7.4
6.5≤,<7.5h (n)	14,011	1,450		15,370	91		14,379	1,082
(%)	90.6	9.4		99.4	0.6		93	7
≥7.5h (n)	15,164	1,514		16,587	91		15,587	1,091
(%)	90.9	9.1		99.5	0.5		93.5	6.5
Sleep time (h)	6.45	6.47	0.276	6.46	6.25	0.003*	6.47	6.29	<0.001*
Physical Exercise (d)	1.82	2.4	<0.001*	1.87	2.36	<0.001*	1.86	2.1	<0.001*
Sex (%)			<0.001†			0.017†			<0.001†
Male	88.7	11.3		99.4	0.6		94.2	5.8
Female	93.1	6.9		99.3	0.7		91	9
Obesity (%)			0.573			0.314			0.706
Underweight	92.4	7.6		99.5	0.5		93.4	6.6
Healthy	90.7	9.3		99.3	0.7		92.6	7.4
Overweight	90.9	9.1		99.4	0.6		92.3	7.7
Obese	91.6	8.4		99.7	0.3		93.5	6.5
Economic level (%)			<0.001‡			0.984			0.438
Highest	89.6	10.4		99.7	0.9		97.9	8.1
Middle     High	89.8	10.2		99.4	0.6		92.4	7.6
Middle	91.6	8.4		99.4	0.6		93.5	6.8
Middle Low	91	9		99.3	0.7		91.9	8.1
Lowest	91.5	8.5		99	1		91.3	8.7
Region (%)			<0.001‡			0.263			0.36
Large City	90.2	9.8		99.4	0.6		92.5	7.5
Small City	91.4	8.6		99.4	0.6		92.8	7.2
Rural Area	91.7	8.3		99.2	0.8		92.6	7.4

* Paired T-test, Significance at P < 0.05.

† Chi-square test, Significance at P < 0.05.

‡ Linear by linear association, Significance at P < 0.05.