Table 3.

Associations of potential risk factors for overweight and obesity.

Variable	Overweight	General obesity	Abdominal obesity
	OR(95%CI)	OR(95%CI)	OR(95%CI)
Age
18~	1.00	1.00	1.00
30~	1.39 (1.17–1.65)	1.45 (1.17–1.79)	1.52 (1.30–1.77)
40~	2.13 (1.82–2.49)	1.93 (1.58–2.35)	2.42 (2.09–2.80)
50~	2.29 (1.97–2.67)	2.09 (1.72–2.54)	3.27 (2.83–3.77)
60~	1.79 (1.53–2.10)	1.41 (1.15–1.72)	2.73 (2.36–3.15)
70~79	1.40 (1.18–1.65)	0.96 (0.78–1.19)	2.26 (1.94–2.64)
P trend	0.748	<0.001	<0.001
Gender
Women	1.00	1.00	1.00
Men	0.94 (0.87–1.02)	0.87 (0.79–0.96)	0.30 (0.28–0.32)
Marital status
Married/cohabiting	1.00	1.00	1.00
Widowed/single/divorced/separation	0.89 (0.82–0.97)	0.86 (0.77–0.96)	0.90 (0.83–0.97)
Education
≤Primary school	1.00	1.00	1.00
≥Junior school	0.98 (0.93–1.03)	0.82 (0.77–0.88)	0.96 (0.91–1.01)
Per capita monthly income
≤500 RMB	1.00	1.00	1.00
500 RMB~	1.13 (1.07–1.19)	1.17 (1.09–1.25)	1.12 (1.07–1.18)
≥1000 RMB	1.08 (1.02–1.14)	1.14 (1.05–1.22)	1.13 (1.07–1.19)
P trend	0.008	0.001	<0.001
Smoking
Never	1.00	1.00	1.00
Ever	0.94 (0.84–1.04)	0.95 (0.83–1.09)	1.03 (0.94–1.14)
Current	0.67 (0.61–0.72)	0.56 (0.50–0.63)	0.77 (0.71–0.84)
Drinking
Never	1.00	1.00	1.00
Ever	1.09 (0.97–1.23)	1.03 (0.87–1.21)	1.08 (0.96–1.21)
Current	1.33 (1.24–1.43)	1.56 (1.42–1.72)	1.53 (1.43–1.64)
Adequate vegetable and fruit intake	0.93 (0.88–0.97)	0.84 (0.79–0.89)	0.87 (0.84–0.91)
High fat diet	1.06 (1.00–1.13)	1.12 (1.04–1.20)	1.19 (1.13–1.26)
Physical activity
low	1.00	1.00	1.00
Moderate	0.89 (0.84–0.94)	0.73 (0.68–0.78)	0.79 (0.75–0.83)
High	0.86 (0.81–0.91)	0.68 (0.64–0.74)	0.71 (0.67–0.75)
P trend	<0.001	<0.001	<0.001

OR: odds ratios, CI: confidence intervals.