表 1. Definition and score assignment of observation indexes in middle-aged and older adult population.

中国中老年人群观察指标的定义与赋值

Variable	Means	Variable assignment
ADL: Activity of daily living.
X1	Sex	Male=1; female=2
X2	Age	45-64 yr. group=1; ≥65 yr. group=2
X3	Education level	Illiterate (1, 0); finishing primary education or part of it (0, 1); finishing middle school or higher-level education (0, 0)
X4	Household registration	Rural=1; urban=2
X5	Marital status	Single, or married but not living together, or divorced or windowed=1; living with a partner but not married, or married and living together=2
X6	Chronic disease	No chronic disease (1, 0); Just 1 chronic disease (0, 1); 2≤chronic disease (0, 0)
X7	Disability	Yes=1; no=2
X8	Dental diseases	Oral diseases=1; no oral diseases=2
X9	ADL	Independent (ADL≤6)=1; dependent (ADL>6)=2
X10	Smoking	Yes=1; no=2
X11	Alcohol	Yes=1; no=2
X12	Sleep time	<6 h (1, 0); 6-8 h (0, 1); ≥9 h (0, 0)
Y	Depression	No depression (CES-D<10)=0; depression (CES-D≥10)=1