关键词: 反复发生上呼吸道感染, 小儿, 影响因素, Logistic回归

Abstract: Objective To explore factors influencing the recurrent upper respiratory tract infection (RRTI) in children aged 3-6 years.Methods Totally 160 children aged 3-6 years with RRTI were selected as case group, and 160 healthy children at the same age were selected as control group. Children′s demographics data, parents′ data, children′s living environment, nutritional status and trace elements were collected. And the influencing factors of RRTI were analyzed by Logistic regression in 3 to 6-year-old children.Results 1) The levels of iron, calcium and zinc in children were significantly lower than those in control group (t =-4.31,-7.98,-7.53, all P <0.05);2)Logistic regression analysis showed that mothers′ education level above high school was the protective factor of RRTI in children (OR=0.279, P=0.024), parents with allergies history (OR=1.412, P=0.004), smoking of family members (OR=1.565, P=0.001), outdoor activities time < 2 h/d (OR=4.963, P=0.033), antimicrobial use≥ 3 times/year (OR=11.894, P＜0.001) were all significantly risk factors for RRTI in children.Conclusion Children lack of calcium, iron, zinc and other trace elements are prone to develop RRTI. Maternal education level above high school was the protective factor of RRTI in children. Avoiding second-hand smoking, decreasing the frequency of antimicrobial use and increasing the daily outdoor activities time can prevent the occurrence of RRTI.

Key words: recurrent upper respiratory tract infection, children, influencing factors, Logistic regression