Table 2.

Analysis of possible risk factors in overweight children.

Possible risk factor		Chi-square	P value	Odds ratio (95% CI)
First born (n=340) vs. last born (n=428)
All		5.03	0.02	0.78 (0.48–0.95)
Female		9.41	0.002	0.51 (0.33–7.9)
Male		0.01	0.92	1.05 (0.62–1.82)
Breast fed (n=1076) vs. bottle fed (n=225) during infancy*
All		4.71	0.03	0.73 (0.52–0.97)
Female		10.77	0.001	0.47 (0.30–0.75)
Male		0.00	0.97	1.03 (0.65–1.63)
Primary (n=288) vs college education (n=566) of fathers*
All		10.24	0.001	1.58
Female		0.93	0.92	0.96
Male		20.25	<0.0001	2.36
Playing outside the house ≤2 h (n=1313) vs. >2 h (n=1032)*
All		0.40	0.52	0.96 (0.67–1.22)
Female	7–9 years	2.66	0.10	2.13 (0.87–6.5)
	10–12 years	0.90	0.34	1.53 (0.69–3.46)
Male	7–9 years	0.02	0.87	0.93 (0.55–1.57)
	10–12 years	8.25	0.004	0.47 (0.28–0.80)
Time spent watching TV ≤3h (n=790) vs. >3h (n=556)*
All		3.12	0.07	1.28 (0.98–1.57) [†]
Female	7–9 years	1.18	0.27	1.73 (0.80–2.34)
	10–12 years	0.05	0.81	0.92 (0.57–1.49)
Male	7–9 years	19.69	<0.001	2.98 (1.79–4.97)
	10–12 years	3.16	0.07	0.66 (0.41–1.04)

^*Mantel-Haenszel summary test