# Table 2 Odds ratio of overweighta and obesityb among children by duration of breastfeeding in infancy (n = 2066)

Overweight Obesity
OR (95% CI) P for trend OR (95% CI) P for trend
1. Breastfeeding duration
0 months 1.00    1.00
< 2 months 0.89 (0.59, 1.34)   0.84 (0.45, 1.56)
2-< 4 months 0.66 (0.42, 1.03)   0.44 (0.20, 0.94)
4-< 6 months 0.69 (0.46, 1.04)   0.53 (0.28, 1.02)
≥6 months 0.54 (0.38, 0.77) < 0.001 0.40 (0.24, 0.69) < 0.001
2. Model 1 + age and sex of child
0 months 1.00    1.00
< 2 months 0.91 (0.60, 1.36)   0.85 (0.46, 1.58)
2-< 4 months 0.67 (0.43, 1.04)   0.44 (0.20, 0.95)
4-< 6 months 0.70 (0.47, 1.05)   0.54 (0.28, 1.03)
≥ 6 months 0.55 (0.39, 0.77) < 0.001 0.40 (0.24, 0.70) < 0.001
3. Model 2 + mother's age at birth, years of secondary education and country of birth
0 months 1.00    1.00
< 2 months 0.94 (0.63, 1.43)   0.90 (0.48, 1.69)
2-< 4 months 0.71 (0.46, 1.12)   0.47 (0.22, 1.03)
4-< 6 months 0.77 (0.51, 1.13)   0.62 (0.32, 1.20)
≥6months 0.63 (0.44, 0.99) 0.001 0.49 (0.28,0.87) 0.005
4. Model 3 + child's mean daily energy intake, physical activity, screen time and sleep duration
0 months 1.00    1.00
< 2 months 0.94 (0.62, 1.43)   0.88 (0.47, 1.68)
2-< 4 months 0.70 (0.44, 1.10)   0.47 (0.22, 1.04)
4- < 6 months 0.78 (0.52, 1.19)   0.61 (0.31, 1.20)
≥ 6 months 0.64 (0.44, 0.91) 0.002 0.51 (0.29, 0.90) 0.009
1. a Age and gender specific BMI equivalent to an adult BMI of ≥25 kg/m2
2. b Age and gender specific BMI equivalent to an adult BMI of ≥30 kg/m2 [18]