关键词: 早产, 出生体重, 影响因素

Abstract: Objective To investigate the incidence and influencing factors of premature infants in Beijing, in order to provide evidence for health management of premature.Methods A retrospective analysis was carried out on 74 994 premature infants from all midwifery institution in 16 districts of Beijing from 2011 to 2016.Results The prevalence rate of the premature infants was 5.49% in neonates born in Beijing from 2011 to 2016, and gender composition ratio is 1.27∶1(boys:girls). Totally 14 146(18.9%) premature infants were born at gestational age under 34 weeks, and 60 848(81.1%) premature infants were born at gestational age more than 34 weeks. Multivariate analysis found that multiple births (OR=2.519, 95%CI:2.433~2.611), female neonates (OR=1.348, 95%CI:1.307~1.387), warm season (OR=1.055~1.074, 95%CI:1.012~1.119) and high-risk neonates (OR=47.619, 95%CI:43.478~50.000) were risk factors of low birth weight in premature infants.Conclusion The prevalence rate of premature infants in Beijing is lower than that in developed countries, but there is an increasing trend year by year. Factors influencing birth weight should be paid more attention to, so as to provide basis for reducing incidence of premature infants and improving the prognosis of premature infants.

Key words: premature infants, birth weight, influencing factors