Table 1.

Variable description

Variable	Description of variable setting	Mean	Std. Dev.
Fall	No fall = 0, ordinary fall = 1, medical treatment for fall = 2	.3374808	.654105
Chronic Disease	The number of chronic diseases	.8448952	1.104562
Smoking	Yes = 1, quit = 2, no = 3	2.311062	.8677768
Drinking	Yes = 1, no = 2	1.695585	.4601982
Sleeptime	The amount of time you sleep each day	6.008928	2.065814
Activity	Vigorous-intensity activity = 1, Moderate activity =2, Mild activity = 3	2.078064	.8131051
Depression	The higher the number, the higher the depression level (range 0–30)	9.58991	6.76546
Pain	No = 0, yes = 1	.7030851	.4569377
ADL	ADL ability = 0, ADL disability = 1	.2657235	.4417554
Gender	Male = 1, female = 2	1.544742	.4980366
Age	60 ~ 69 = 1, 70 ~ 79 = 2, 80 ~ ~ = 3	1.506903	.656535
Education	Junior high school or below =1; Senior high school or above =2	1.100051	.3000937
Residence	Urban = 1, rural =2	1.721152	.4484707
Economic status	Continuous variable, take the log of economy	7.540106	3.073686
Marital status	Married = 1, single = 2	1.187489	.3903371
Care	With care =1, without care = 2	1.755071	.4300819