OBJECTIVE To compare the length of stay (LOS) against the expected date of delivery (EDD) and to describe mortality and LOS outcomes by gestational age (GA) categories over the years. STUDY DESIGN Healthcare Cost and Utilization Project Kids' Inpatient database discharge records for years 2003, 2006, 2009, 2012, and 2016 were analyzed. For premature infants after inclusion-exclusion, actual, and calculated LOS were compared. Mortality and LOS outcomes were analyzed by GA and years. RESULTS The majority (99%) of infants >28 weeks were discharged by EDD while, for neonate ≤28 weeks, about three-quarters (75%) of infants were discharged by calculated EDD. LOS is increasing while mortality is decreasing by GA categories in recent years. CONCLUSIONS This is the largest study of mortality and LOS in the United States. Our study provides evidence-based numbers comparing actual LOS against EDD, which can be used in perinatal settings to counsel parents.

中文翻译：

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大多数早产儿会在预产期前出院吗？

目的 将住院时间 (LOS) 与预期分娩日期 (EDD) 进行比较，并描述多年来按胎龄 (GA) 类别划分的死亡率和 LOS 结果。研究设计 医疗保健成本和利用项目 对 2003 年、2006 年、2009 年、2012 年和 2016 年的儿童住院数据库出院记录进行了分析。对于纳入排除后的早产儿，比较了实际和计算的 LOS。通过 GA 和年份分析死亡率和 LOS 结果。结果 大多数 (99%) 大于 28 周的婴儿通过 EDD 出院，而对于 ≤ 28 周的新生儿，大约四分之三 (75%) 的婴儿通过计算出的 EDD 出院。近年来，按 GA 类别划分的 LOS 正在增加，而死亡率正在下降。结论 这是美国最大的死亡率和 LOS 研究。