Table 3.

Factors associated with anxiety: univariate and multivariable analyses.

Variables	Crude OR (95% CI)	Adjusted OR (95% CI)
Sex
Male	1	1
Female	1.06 (0.89, 1.26)	1.13 (0.94, 1.35)
Age group
18–29	1	1
30–44	0.51 (0.33, 0.78)*	0.57 (0.36, 0.89)*
45–59	0.60 (0.38, 0.93)*	0.61 (0.38, 0.98)*
60–	1.20 (0.42, 3.43)	0.88 (0.29, 2.67)
Area
Urban-Beijing	1	1
Rural-Beijing	1.29 (1.08, 1.54)*	1.02 (0.83, 1.25)
Urban-other	2.13 (1.43, 3.17)**	1.73 (1.14, 2.63)*
Rural-other	2.37 (1.55, 3.60)**	1.50 (0.95, 2.36)
Education
Primary	1	1
Junior	0.69 (0.38, 1.26)	0.94 (0.50, 1.78)
Senior	0.41 (0.22, 0.76)*	0.77 (0.40, 1.47)
College	0.38 (0.21, 0.68)*	0.79 (0.41, 1.50)
Postgraduate	0.55 (0.27, 1.09)	0.91 (0.43, 1.92)
Occupation
Medicine	0.78 (0.49, 1.24)	0.88 (0.54, 1.41)
Staff	1	1
Self-employment/employee	1.04 (0.82, 1.31)	0.89 (0.68, 1.16)
Farmer	2.17 (1.68, 2.81)**	1.43 (1.03, 1.99)*
Other	1.07 (0.86, 1.32)	0.90 (0.71, 1.15)
Excise
No	1	1
< 30 min	0.76 (0.51, 1.12)	0.90 (0.60, 1.36)
30–60 min	0.48 (0.32, 0.71)**	0.62 (0.41, 0.94)*
> 60 min	0.45 (0.30, 0.68)**	0.57 (0.37, 0.88)*
Sleeping time
< 6 h	2.86 (2.14, 3.82)**	2.64 (1.96, 3.57)**
6–8 h	1	1
8–10 h	0.95 (0.80, 1.14)	0.93 (0.78, 1.11)
> 10 h	1.23 (0.77, 1.98)	1.05 (0.64, 1.72)
Knowledge
Quartile 1	1	1
Quartile 2	0.51 (0.41, 0.64)**	0.58 (0.46, 0.73)**
Quartile 3	0.42 (0.33, 0.53)**	0.48 (0.37, 0.61)**
Quartile 4	0.38 (0.31, 0.47)**	0.42 (0.33, 0.52)**

**P<0.001.

*P <0.05.