Table 2.

Crude and adjusted prevalence ratio (PR) of obesity by characteristics of the study participants, based on Poisson multiple regression analysis

Variables	Crude PR	95% CI	p value	Adjusted PR	95% CI	p value
Age, years
18–29	1.00	–	–	1.00	–	–
30–39	1.88	1.47–2.40	<0.001	1.70	1.33–2.18	<0.001
40–49	1.95	1.47–2.59	<0.001	1.48	1.11–1.97	0.01
50–59	1.91	1.41–2.60	<0.001	1.43	1.03–1.97	0.03
≥60	1.85	1.37–2.49	<0.001	1.36	0.98–1.88	0.07
Sex
Male	1.00	–	–	1.00	–	–
Female	2.00	1.64–2.45	<0.001	1.90	1.55–2.32	<0.001
Hypertension
No	1	–	–	1	–
Yes	1.94	1.63–2.31	<0.001	1.75	1.44–2.12	<0.001
Diabetes				NS	NS	NS
No	1	–
Yes	1.88	1.45–2.43	<0.001
Physical activity
No	1.58	1.28–1.95	<0.001	1.25	1.01–1.54	0.04
Yes	1	–	1	–
Smoking				NS	NS	NS
No	1.39	1.07–1.80	0.014
Yes	1	–	–
Alcohol consumption				NS	NS	NS
No	1.44	1.11–1.88	0.065
Yes	1	–	–
Family history of diabetes				NS	NS	NS
No	1	–	–
Yes	1.51	1.26–1.82	<0.001
Family history of hypertension				NS	NS	NS
No	1	–
Yes	1.33	1.12–1.60	0.001
Educational level				NS	NS	NS
No schooling	1	–	–
Elementary education	0.84	0.65–1.09	0.19
Secondary education	0.87	0.62–1.23	0.44
Higher education	1.10	0.62–1.95	0.74
Income (minimum wage)*
<1	1	–	–	1.00	–	–
1 to <2	0.98	0.80–1.21	0.87	1.14	0.93–1.40	0.19
2 to <3	0.83	0.63–1.09	0.18	0.93	0.72–1.20	0.58
≥3	1.32	0.97–1.79	0.08	1.46	1.08–1.96	0.01

NS = the variable was non-significant to be included in the adjusted model.

^*Minimum wage at study time: USD 315.00.