Table 7.

Results of the logistic regression for sociodemographic characteristics associated with smoking status.

Variable	Overall		Urban		Rural
	OR	95%CI	OR	95%CI	OR	95%CI
Gender
Female	1.00		1.00		1.00
Male	26.234**	(21.528, 31.969)	31.260**	(22.942, 42.594)	23.889**	(18.431, 30.962)
Age
Low (60–69 years)	1.00		1.00		1.00
Middle (70–79 years)	0.501**	(0.393, 0.640)	0.422**	(0.295, 0.604)	0.556**	(0.400, 0.775)
High (80 years or above)	0.688**	(0.533, 0.887)	0.756	(0.523, 1.120)	0.626**	(0.443, 0.886)
Region
East	1.00		-		1.00
Central	1.265**	(1.067, 1.499)	-	-	1.530**	(1.209, 1.937)
West	1.026	(0.865, 1.217)	-	-	1.094	(0.875, 1.367)
Education level
Elementary education and below	1.00		1.00		1.00
Secondary education	0.475**	(0.323, 0.698)	0.493**	(0.323, 0.752)	0.107*	(0.013, 0.908)
Higher education and above	0.483**	(0.332, 0.701)	0.491**	(0.331, 0.728)	0.117*	(0.014, 0.991)
Have you ever heard of e-cigarettes?
No	1.00		1.00		1.00
Yes	1.764**	(1.486, 2.095)	1.686**	(1.334, 2.123)	1.844**	(1.419, 2.395)
Rules about smoking at home
Allowed	1.00		1.00		-
Not allowed, but with exceptions	0.308**	(0.172, 0.552)	0.117**	(0.038, 0.358)	-	-
Never allowed	0.981	(0.538, 1.790)	0.429	(0.138, 1.329)	-	-
No rules	1.179	(0.684, 2.147)	0.628	(0.202, 1.951)	-	-
Don't know/Refuse	0.640	(0.355, 1.153)	0.415	(0.134, 1.288)	-	-
Scores of smoking-related knowledge
0–4	1.00		1.00		1.00
5–7	0.674**	(0.558, 0.814)	0.606**	(0.465, 0.791)	0.751*	(0.570, 0.989)
8–10	1.023	(0.834, 1.256)	0.946	(0.717, 1.247)	1.136	(0.831, 1.553)

^*Significant at P < 0.05;

^**Significant at P < 0.01.