*At risk of overweight was defined by BMI for age Z score > 1 at 4–5 years according to the 2006 WHO Growth Standard.
†Individual growth rates of BMI and BMI Z score in different periods were calculated by previous mixed model and then high growth rates was assigned the value 1, if someone’s growth rate was in the highest tertile of growth rate values in the entire population; otherwise it was assigned the value 0.
‡Logistic regression was used to present odds ratio and 95%CI of at risk of overweight with high growth rates of BMI and BMI Z score in different periods after adjusted for breast feeding, residential area, gestational age, birth weight maternal education and occupation.