Objective To understand the incidence of small gestational age (SGA) and large gestational age (LGA) infants in two cities of Hunan province,and analyze their determinants to provide evidence for prevention on SGA and LGA infants. Method sA stratified cluster sampling method was used to select the subjects,who were pregnant women hospitalized in local midwifery institutions in Zhuzhou city and Xiangtan city of Hunan province from January 2016 to June 2016.The sociodemographic characteristics of parents,family economic status and conditions related to the pregnancy were collected,and the birth information of the neonates was recorded.Chi-square test and Fisher probabilities method were used to compare the incidence of SGA and LGA infants,and multinomial Logistic regression was used to analyze the determinants of SGA and LGA infants. Results The incidence of SGA infants was 6.5% (328/5 012),and 7.9% (394/5 012) for LGA infants.The multinomial Logistic regression showed that the regulatory prenatal examination during pregnancy was the common protective factor for SGA and LGA,anemia during pregnancy and hypertensive disorders complicating pregnancy were the independent risk factors for SGA,diabetes mellitus complicating pregnancy,maternal age ≥ 35 years,and paternal age ≥ 30 years were the independent risk factors for LGA. Conclusion Regulatory prenatal examination would decrease the risk of SGA and LGA,anemia during pregnancy and hypertensive disorders complicating pregnancy would increase the risk of SGA,diabetes mellitus complicating pregnancy,increasing maternal age and paternal age would increase the risk of LGA.
Key words
small for gestational age /
large for gestational age /
incidence /
determinant
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