Table 1. Characteristics of the non-overweight and overweight/obesity groups.

Variables	Non-overweight N = 1222		Overweight/Obesity N = 126		Significance
	n	%	n	%	Χ2	P value
Family-based factors
Number of siblings
None (only child)	687	56.20%	92	73.00%	13.21	0.000
One or more	535	43.80%	34	27.00%
Family location					9.22	0.01
Rural	116	9.50%	2	1.60%
Semirural	227	18.60%	23	18.30%
Urban	879	71.90%	101	80.20%
Family financial situation					0.29	0.87
Poorer than others	123	10.10%	12	9.50%
About the same as others	786	64.30%	79	26.70%
Richer than others	313	25.60%	35	27.80%
Father’s education level					6.72	0.035
Less than senior high school	102	8.30%	5	4.00%
Senior high or technical school	945	77.30%	94	74.60%
University or higher	178	14.40%	27	21.40%
Mother’s education level					2.43	0.291
Less than senior high school	120	9.80%	9	7.10%
Senior high or technical school	966	79.10%	98	77.80%
University or higher	136	11.10%	19	15.10%
How much time do you spend with your father in elementary school?					7.45	0.006
Less than half	331	27.10%	20	15.90%
More than half	891	72.90%	106	84.10%
How much time do you spend with your mother in elementary school?					8.29	0.004
Less than half	155	12.70%	5	4.00%
More than half	1067	87.30%	121	96.00%
Lifestyle factors
Skipping breakfast					4.54	0.033
Yes	143	11.70%	23	18.30%
No	1079	88.30%	103	81.70%
Sleeping hours					2.16	0.34
<6.0	105	8.60%	10	7.90%
6.0–8.0	812	66.40%	77	61.10%
8.0+	305	25.00%	39	31.00%
Vigorous physical activity					2.87	0.075
Yes	277	22.70%	37	29.40%
No	945	77.30%	89	70.60%
Moderate physical activity					3.78	0.052
Yes	157	12.80%	24	19.00%
No	1065	87.20%	102	81.00%