Table 3. Subjective household economic status and obesity stratified by gender or time affluence (n = 1,848).

	Total, n	Obesity		Model 1a	Model 2b	P-interactionb
		n	%	OR (95% CI)	OR (95% CI)
Gender
Boys (n = 917)
Affluent	276	15	5.4	1.00 (reference)	1.00 (reference)
Neither	294	18	6.1	1.14 (0.56–2.31)	1.38 (0.66–2.87)
Less affluent	267	12	4.5	0.82 (0.38–1.79)	1.02 (0.45–2.27)
Non-affluent	80	8	10.0	1.93 (0.79–4.73)	2.61 (1.01–6.72)
P-trend				0.524	0.222	0.872
Girls (n = 931)
Affluent	271	19	7.0	1.00 (reference)	1.00 (reference)
Neither	306	26	8.5	1.23 (0.67–2.28)	1.19 (0.63–2.23)
Less affluent	269	17	6.3	0.91 (0.46–1.79)	0.91 (0.45–1.82)
Non-affluent	85	11	12.9	1.97 (0.90–4.33)	2.16 (0.92–5.05)
P-trend				0.372	0.348
Time affluence
>Less affluent time (Affluent, Neither) (n = 683)
Affluent	239	15	6.3	1.00 (reference)	1.00 (reference)
Neither	260	27	10.4	1.77 (0.91–3.42)	1.80 (0.92–3.53)
Less affluent	155	7	4.5	0.71 (0.28–1.79)	0.68 (0.27–1.74)
Non-affluent	29	2	6.9	1.11 (0.24–5.14)	1.08 (0.23–5.13)
P-trend				0.746	0.651	0.191
≤Less affluent time (Less affluent, Non-affluent) (n = 1,162)
Affluent	308	19	6.2	1.00 (reference)	1.00 (reference)
Neither	339	17	5.0	0.80 (0.41–1.56)	0.82 (0.42–1.62)
Less affluent	379	22	5.8	0.93 (0.50–1.76)	1.03 (0.54–1.97)
Non-affluent	136	17	12.5	2.14 (1.07–4.26)	2.35 (1.16–4.76)
P-trend				0.079	0.041

CI, confidence interval; OR, odds ratio.

^aModel 1 was adjusted for gender (except in the stratified analysis by gender) and age (month; continuous).

^bModel 2 was adjusted for gender (except in stratified analysis by gender), age (month; continuous), health literacy score (tertile categories: ≤18 points, 19–20 points, ≥21 points, missing), time affluence (more affluent, neither, less affluent, non-affluent, missing; except in the stratified analysis by time affluence).