Abstract: Objective:To explore the correlation between overweight or obesity at different months of infancy and that in subsequent months; to provide evidence for the early intervention of overweight or obesity in children.Methods:The physical records at birth, 42 days, 3 months, 6 months and 12 months were retrospectively collected from 12-month-old children who underwent physical examination in the Child Healthcare Clinic of Anhui Maternal and Child Healthcare Hospital from October 2019 to February 2020. The situation of overweight or obesity in each month age and its correlation with overweight or obesity in subsequent month ages was analyzed.Results:Among the 378 12-month infants surveyed, 22(5.8%) infants were macrosomia at birth,10(2.6%),17(4.5%), 27(7.1%), and 23(6.1%) infants were overweight or obese at 42 days, 3 months, 6 months, and 12 months, respectively. The univariate analysis showed that macrosomia were more likely to be overweight or obese at 6 months and 12 months. Those who were overweight or obese at 42 days were more likely to be overweight or obese at 3 months. The infants with overweight or obese at 3 months, were more likely to be overweight or obese at 6 months and 12 months. Those with overweight or obese at 6 months, were more likely to be overweight or obese at 12 months. The differences were all statistically significant(P<0.05). Multivariate analysis showed that macrosomia was more likely to be overweight or obese at 12 months(OR=5.386). Those who were overweight or obese at 42 days were more likely to be overweight or obese at 3 months(OR=5.782). Being overweight or obese at 3 months, were more likely to be overweight or obese at 6 months and 12 months(OR=11.957, OR=7.886). Being overweight or obese at 6 months, were more likely to be overweight or obese at 12 months(OR=11.893). The differences were all statistically significant(P<0.05).Conclusion:Infancy is a crucial period for obesity control. Overweight or obesity in every month of age is a risk factor for overweight or obesity at subsequent months.

Key words: Obesity, Overweight, Correlation, Infants