求翻译：选2010年3月至2011年9月我院全部新生儿5238例，其中晚期早产儿110例为研究组，采用单纯随机抽样法选出足月儿220例为对照组。记录2组患儿健康状况及疾病，并对2组高危因素进行比较分析。是什么意思？

Election of March 2010 to September 2011, all newborns of 5238 cases, 110 cases of which the late preterm children full-term children for the study group, using simple random sampling method to elect the 220 cases in the control group. Records of two groups of children with health conditions and dis

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Elects from March, 2010 to September, 2011 my courtyard complete newborn 5238 examples, in which later period premature infant 110 examples is the study team, uses the pure stochastic sampling method to select the full-term 220 examples is the control group.Records 2 group of trouble states of healt

Selected March 2010 all newborns in 5,238 cases in our hospital, which advanced 110 cases of prematurity study group, using the elected term of 220 cases of simple random sampling method for the control group. Record 2 groups of children with health and disease, and comparative analysis of the 2 gro

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