Abstract: Objective:To explore the risk factors for recurrent respiratory tract infection (RRTI) in children, and to provide basis for early prevention.Methods:Eighty cases of RRTI children treated in our hospital from 2015 to 2019 were collected as the study group, and 160 cases of healthy children receiving physical examination in the same period were selected as the control group. The general information, early postpartum feeding, health status, trace element level and immune function of the two groups were compared to screen for the risk factors for RRTI.Results:Univariate analysis showed that gender, mode of delivery, complementary food, hemoglobin, iron ion, zinc ion and IgG were the risk factors for RRTI in children (P<0.05). Multivariate analysis showed that hemoglobin, iron ion, zinc ion and IgG were still risk factors for RRTI in children (P<0.05).Conclusion:In the diagnosis and treatment of children with RRTI, besides giving standard and scientific treatment, treatment of RRTI, we should pay attention to the nutrition status and immune function of the children in order to reduce RRTI.

Key words: Recurrent respiratory tract infection, Risk factors, Investigation, Children