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Original Article

Neonatology (Perinatology)

Association between base excess levels and clinical outcomes among very low birth weight infants: a multicenter birth cohort study in South Korea

Ji Yoo Kim, Hyeon Jin Kim, Heeyoon Choi, Minji Kim, Jinseok Lee, Yong Sung Choi, Dong Keon Yon

Clin Exp Pediatr. 2026;69(7):555-562. Published online May 21, 2026

Question: Is metabolic acidosis at birth in very low birth weight infants (VLBWIs) associated with long-term clinical outcomes?
Finding: Metabolic acidosis at birth was associated with increased mortality, adverse respiratory outcomes, neurological morbidities, and infection-related and gastrointestinal outcomes.
Meaning: VLBWIs with metabolic acidosis are at high risk of systemic complications. This finding emphasizes the need for close monitoring and comprehensive care.

DOI: https://doi.org/10.3345/cep.2025.02817

Short-term clinical outcomes of late preterm infants

Ji Youn Na, Narimi Park, Eun Sun Kim, Jin-A Lee, Gyu Hong Shim, Jin-A Lee, Chang Won Choi, Ee-Kyung Kim, Han-Suk Kim, Beyong Il Kim, Jung-Hwan Choi

Clin Exp Pediatr. 2009;52(3):303-309. Published online March 15, 2009

Purpose : To identify the short-term clinical outcomes of late preterm infants and to test the hypothesis that late preterm infants have more clinical problems during the early postnatal period than term infants. Methods : One hundred late preterm infants [gestational age (GA) 34+0-36+6 weeks] and the same number of term infants (GA 37+0-41+6 weeks) were randomly selected from 289 late...

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