Table 2.

Factors associated with good quality of sleep, CLHLS, 2005

	Model I	Model II	Model III
Ages 80-89 (ages 65-79)	0.92 (0.84,1.01)	0.96 (0.88,1.06)	1.19 (1.07,1.32)**
Ages 90-99 (ages 65-79)	0.98 (0.90,1.07)	1.04 (0.94,1.15)	1.38 (1.23,1.55)***
Ages 100+ (ages 65-79)	1.06 (0.96,1.17)	1.13 (1.00,1.26)*	1.70 (1.48,1.95)***
Men	1.42 (1.32,1.52)***	1.27 (1.17,1.39)***	1.23 (1.12,1.34)***
Han ethnicity	1.34 (1.17,1.54)***	1.32 (1.15,1.51)***	1.47 (1.27,1.69)***
Urban	0.91 (0.85,0.97)**	0.86 (0.80,0.92)***	0.88 (0.82,0.94)***
Northeast (north)	1.43 (1.20,1.71)***	1.48 (1.24,1.77)***	1.53 (1.27,1.84)***
East (north)	1.03 (0.89,1.19)	1.04 (0.90,1.21)	1.01 (0.87,1.18)
Central/South (north)	0.78 (0.67,0.90)**	0.84 (0.72,0.98)*	0.77 (0.66,0.90)**
West (north)	1.36 (1.16,1.60)***	1.43 (1.21,1.69)***	1.33 (1.12,1.58)***
1+ years of schooling		1.00 (0.92,1.08)	0.98 (0.90,1.06)
Good family economic condition		1.67 (1.52,1.85)***	1.56 (1.41,1.73)***
Got adequate medical service		2.20 (1.98,2.44)***	1.84 (1.66,2.05)***
Married		1.00 (0.92,1.10)	0.98 (0.89,1.08)
No. of living children		1.00 (0.98,1.02)	1.00 (0.99,1.02)
Live with spouse or family (alone)		1.11 (1.01,1.23)*	1.17 (1.05,1.30)*
Institutionalized (alone)		0.78 (0.63,0.98)*	0.85 (0.68,1.07)
Current smoker		1.13 (1.03,1.25)**	1.06 (0.96,1.17)
Current alcohol consumer		1.27 (1.16,1.39)***	1.16 (1.05,1.27)**
IADL disabled			0.66 (0.60,0.72)***
ADL disabled			0.89 (0.81,0.98)*
Cognitively impaired			0.95 (0.87,1.04)
Self-rated poor health			0.54 (0.50,0.59)***
Have 1+ chronic diseases			0.66 (0.61,0.71)***
Often anxious			0.62 (0.53,0.73)***
-LL	10072.8***	9845.4***	9506.8***

Numbers in the table are odds ratios and the 95% confidence intervals based on binary logistic regression. Category in the parentheses is the reference for categorical variables. All other variables are dichotomous.

^*P < 0.05;

^**P < 0.01;

^***P < 0.001.