Ascertainment bias may overestimate NDI in extremely low-birth-weight or extremely low-gestational-age survivors at 18 to 24 months. Alternatively, the characteristics of different populations and health systems may contribute to higher rates of attrition and higher rates of NDI.
2012-02-07
Eng.
Archives of pediatrics & adolescent medicine
Division of Neonatology, The Children's Hospital of Philadelphia, PA 19104, USA.
Arch Pediatr Adolesc Med. 2012 Feb;166(2):178-84
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