Table 2 Comparison analysis of association between physical ability and general characteristics in 2008 (N=2,296)

Variables 2008	ADL					IADL
	–Average		+Average		p-value1)	–Average		+Average		p-value1)
	N	%	N	%		N	%	N	%
Age (yr)					<.001					<.001
18–29	100	18.0	456	82.0		141	25.4	415	74.6
30–39	78	18.7	340	81.3		93	22.2	325	77.8
≥40	72	5.4	1,250	94.6		62	4.7	1,260	95.3
Marital status					0.032					0.007
Married	160	10.0	1,444	90.0		187	11.7	1,417	88.3
Others2)	90	13.0	602	87.0		109	15.8	583	84.2
Gender					0.009					0.618
Male	130	12.8	886	87.2		127	12.5	889	87.5
Female	120	9.4	1,160	90.6		169	13.2	1,111	86.8
Health condition					0.363					0.407
Unhealthy	60	9.9	546	90.1		84	13.9	522	86.1
Healthy	190	11.2	1,500	88.8		212	12.5	1,478	87.5
Insurance status					<.001					0.119
No insurance	182	12.8	1,244	87.2		196	13.7	1,230	86.3
Have insurance	68	7.8	802	92.2		100	11.5	770	88.5
Education					<.001					0.431
Elementary	74	10.7	616	89.3		86	12.5	604	87.5
Junior high school	26	5.6	439	94.4		51	11.0	414	89.0
Senior high school	101	15.1	568	84.9		93	13.9	576	86.1
College/University	49	10.4	423	89.6		66	14.0	406	86.0
Residence					0.178
Urban	217	10.6	1,833	89.4		286	14.0	1,764	86.0	<.001
Rural	33	13.4	213	86.6		10	4.1	236	95.9

Note: Chi-square test.
Separated, single, divorced, widow/er, cohabitate.
ADL, Activities of Daily Living; IADL, Instrumental Activities of Daily Living.