Table 3. Associations between indicators of socioeconomic status (SES) and obesity by age group among 38 825 males in a cohort of Thai distance-learning students.

	Crude ORs, all ages, 95% CI		Adjusted ORsa, 95% CI
			15–25 yrs		26–39 yrs		≥40 yrs
Education level
High school	1		1		1		1
Vocational school	1.06	1.00–1.13	1.06	0.90–1.25	1.09	1.00–1.19	1.07	0.95–1.22
University	1.35	1.27–1.43	1.27	1.05–1.54	1.15	1.06–1.25	1.01	0.90–1.13
(P-trend)			(0.021)		(<0.001)		(0.760)
Personal income, baht/month
≤7000	1		1		1		1
7001–10 000	1.34	1.25–1.44	0.92	0.78–1.10	1.15	1.04–1.26	1.11	0.90–1.37
10 001–20 000	2.25	2.11–2.40	1.13	0.89–1.44	1.27	1.15–1.39	1.30	1.10–1.53
>20 000	3.31	3.08–3.57	1.05	0.63–1.73	1.54	1.35–1.75	1.34	1.13–1.58
(P-trend)			(0.686)		(<0.001)		(<0.001)
Household assets, baht
<30 000	1		1		1		1
30 001–60 000	1.53	1.44–1.63	1.44	1.23–1.69	1.14	1.05–1.24	1.24	1.08–1.43
>60 000	2.36	2.23–2.51	2.00	1.67–2.39	1.45	1.33–1.58	1.43	1.25–1.64
(P-trend)			(<0.001)		(<0.001)		(<0.001)
Housing typeb
Apartment	1		1		1		1
Semi-detached/shop/townhouse	1.57	1.44–1.72	1.71	1.29–2.26	1.19	1.06–1.34	1.25	1.01–1.54
Detached	1.10	1.02–1.19	1.39	1.07–1.79	1.07	0.96–1.19	1.09	0.89–1.34

^aAdjusted ORs were from a logistic regression model for each SES factor, ie, age (years), urbanization, and marital status.

^bThere was no natural order for housing type, so P-trend was not calculated.