Table 2. Socio-demographic factors associated with increased weight in the past six months.

Variables		Multiple Logistic Regression analysis aOR (95%CI)	P	Stepwise Logistic Regression analysis aOR (95%CI)	P *
Age years		0.97 (0.96–0.98)	< .001	0.97 (0.96–0.98)	< .001
Sex
	Male (ref)	1 (ref)
	Female	1.16 (0.96–1.39)	.13
Race
	Asian (ref)	1 (ref)
	White	1.28 (0.93–1.76)	.13
	Black	0.83 (0.58–1.19)	.32
	American Indian or Alaska Native	0.85 (0.54–1.34)	.49
	Others	1.06 (0.82–1.37)	.66
Years of Education
	0–9 years (ref)	1 (ref)		1 (ref)
	10–12 years	1.50 (0.88–2.54)	.13	1.57 (0.93–2.65)	.09
	> 12 years	1.84 (1.13–3.01)	.02	1.90 (1.17–3.09)	.01
Residence
	Urban area (ref)	1 (ref)
	Rural area	1.09 (0.89–1.34)	.41
	Rural–urban fringe	1.23 (0.91–1.65)	.18
Current household composition
	live alone (ref)	1 (ref)		1 (ref)
	live with family	1.34 (1.00–1.79)	.05	1.38 (1.04–1.84)	.03
	live with other people	1.09 (0.72–1.64)	.69	1.11 (0.74–1.67)	.62
Work/study status
	Full-time (ref)	1 (ref)		1 (ref)
	Part-time/self employed	0.59 (0.43–0.82)	.001	0.57 (0.42–0.78)	< .001
	Students	0.71 (0.56–0.90)	.005	0.71 (0.57–0.89)	.003
	Others	0.66 (0.44–0.98)	.04	0.66 (0.44–0.98)	.04
Chronic physical conditions
	Obesity
	Yes	2.58 (1.86–3.58)	< .001	2.73 (2.08–3.59)	< .001
	No	1 (ref)		1 (ref)
	Hypertension
	Yes	1.22 (0.86–1.73)	.28
	No	1 (ref)
	Others
	Yes	1.07 (0.83–1.39)	.60
	No	1 (ref)
Mental illnesses or conditions
	Yes	0.82 (0.65–1.05)	.11
	No (ref)	1 (ref)

*Significant at p < 0.05