Table 2.

Relationship between demographic factors and smoking among college students in the rural area

Variable	β	SE	Wald–χ2	p	OR ( 95% CI)
Sex	-0.883	0.345	6.554	0.010	0.4 (0.2–0.8)
Age	0.165	0.368	0.201	0.654	1.2 (0.6–2.4)
Marital status	0.235	0.466	0.254	0.614	1.3 (0.5–3.2)
Study level	-0.258	0.214	1.455	0.228	0.8 (0.5–1.2)
Residence	-1.453	0.351	17.187	0.000	0.2 (0.1–0.5)
Family income	-0.676	0.268	6.349	0.012	2.0 (1.2–3.3)
College departments	0.117	0.218	0.287	0.592	1.1 (0.7–1.7)

β: estimated coefficient, SE: standard error, OR: odds ratio, CI: confidence interval.