FOLLOW UP OF EXTREMELY LOW BIRTH WEIGHT INFANTS FROM 401 TO 1000 GRAMS

出生体重在401和1000克之间的婴儿，出生于1993年1月1日和1994年10月31日之间，在新生儿特殊护理病房照顾，并存活到出院，回顾性地定位和评价了一组发育测试在18个月和22个月大。 自1994年11月以来，对出生体重在401克至1000克之间、在新生儿特殊护理病房接受护理并存活至出院的婴儿进行了前瞻性随访，并在18至22个月矫正年龄时进行了相同的发育测试。这些数据被提交给NICHD新生儿研究数据中心，用于确定与当前新生儿重症监护实践相关的结果。 (This是一项观察性研究;因此，整个研究的预期患者数量没有确定。）

Infants with birthweights between 401 and 1000 grams who were born between January 1, 1993, and October 31, 1994, cared for in the Newborn Special Care Unit, and survived to hospital discharge were retrospectively located and evaluated with a battery of developmental tests at 18 and 22 months of age. Since November 1994, infants with birthweights between 401 and 1000 grams who were cared for in the Newborn Special Care Unit and survived to discharge were followed prospectively and evaluated with the same battery of developmental tests at 18 to 22 months corrected age. These data are submitted to the common NICHD Neonatal Research data center and are used to determine outcome which can be related to current newborn intensive care practices. (This is an observational study; therefore, there is not a defined number of patients expected for the entire study.)