Table 2.

Odds ratios of knowledge scores with socio-demographic characteristics (good vs. poor).

Independent variable	Bivariate		Multivariate
	Crude odds ratio (95% CI)	p-value	Adjusted odds ratio (95% CI)	p-value
Age (in years)		0.028		0.438
18–24	1		1
25–30	2.28 (1.43–1.87)		1.96 (0.32–0.56)	0.035*
31–35	2.15 (1.52–1.76)		1.99 (0.55–1.28)	0.042*
>35	1.31 (1.32–1.93)		1.21 (1.02–1.87)	0.158
Relationship status		0.041		0.058
Single and not in any relationship	1		1
Married	1.15 (0.64–1.23)		1.04 (0.42–1.65)	0.296
Living together	1.21 (1.02–2.14)		1.32 (1.34–2.23)	0.021*
Married but living separately	1.02 (1.43–2.21)		1.29 (1.28–1.41)	0.483
Divorced	1.10 (0.43–0.97)		1.02 (1.23–1.74)	0.369
Level of education		<0.001		0.003*
Elementary	1		1
Secondary	1.14 (1.23–2.56)		1.05 (0.93–1.62)	0.360
Graduate	1.53 (0.87–1.43)		2.02 (0.71–1.13)	0.052
Postgraduate	2.02 (1.76–2.14)		2.51 (2.06–2.48)	0.013*
Employment		<0.001		0.002*
Jobless	1		1
Unskilled labor	1.02 (1.32–2.14)		1.10 (1.25–1.48)	0.347
Skilled labor	1.25 (1.56–2.32)		1.11 (0.62–1.29)	0.512
Professional	1.93 (0.76–1.57)		2.03 (1.28–1.70)	0.494
Manager	3.42 (1.82–2.19)		3.01 (1.82–2.19)	0.012*
Monthly income (USD)		0.030		0.428
<200	1		1
201–300	1.29 (1.23–1.52)		0.99 (0.43–1.32)	0.384
301–400	1.33 (1.24–1.98)		1.03 (0.54–0.98)	0.512
401–500	1.54 (2.13–3.82)		1.04 (1.43–1.85)	0.419
501–600	1.56 (1.62–1.93)		1.46 (0.67–1.23)	0.376
>600	1.79 (0.81–1.36)		1.78 (1.98–2.43)	0.037*
Type of household		0.604	-	-
Apartment	1
Low-cost housing	0.73 (1.46–1.98)
Informal housing	0.68 (0.87–1.53)
Condominium	1.49 (0.98–1.74)
Bungalow	1.52 (1.72–2.48)
Lodging house	0.84 (1.98–2.64)
Others	1.02 (0.43–0.87)

^*p < 0.05.