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Recent outcome of extremely low birth weight infants - The use of CRIB(clinical risk index for babies) II score for analyzing the survival rate -  

Kim, Do-Hyeon (Departments of Pediatrics, College of Medicine, Seoul National University)
Shim, So-Yeon (Department of Pediatrics, Gil Medical Center, Gacheon Medical School)
Kim, Jae-Ri (Departments of Pediatrics, College of Medicine, Seoul National University)
Shin, Seung-Han (Departments of Pediatrics, College of Medicine, Seoul National University)
Kim, Eun Sun (Departments of Pediatrics, College of Medicine, Seoul National University)
Joung, Kyoung-Eun (Departments of Pediatrics, College of Medicine, Seoul National University)
Kim, Sang Duk (Departments of Pediatrics, College of Medicine, Seoul National University)
Lee, Jin A (Department of Pediatrics, Boramae Hospital, Seoul National University)
Choi, Chang Won (Departments of Pediatrics, College of Medicine, Seoul National University)
Kim, Ee-Kyung (Departments of Pediatrics, College of Medicine, Seoul National University)
Kim, Han-Suk (Departments of Pediatrics, College of Medicine, Seoul National University)
Kim, Beyong Il (Departments of Pediatrics, College of Medicine, Seoul National University)
Choi, Jung-Hwan (Departments of Pediatrics, College of Medicine, Seoul National University)
Publication Information
Clinical and Experimental Pediatrics / v.49, no.9, 2006 , pp. 952-958 More about this Journal
Abstract
Purpose : The survival rate of infants weighing less than 1,000 g at birth(extremely low birth weight infants, ELBWI) has increased due to recent advances in perinatal and neonatal intensive care. The purpose of this study was to evaluate the survival rates of ELBWI born at Seoul National University Hospital during the last six years. Methods : A total of 99 infants were divided into three groups(period I: 2000 to 2001, period II: 2002 to 2003, period III : 2004 to 2005) based on date of birth. We compared the survival rate of ELBWI over the three periods, using CRIB II score for adjustment for clinical severity. Results : Overall survival rate of ELBWI was 74.7 percent. The survival rate of ELBWI increased over the three periods(period I: 60.7 percent, period II : 73.3 percent, period III : 85.3 percent). The threshold of viability(defined as survival of at least 50 percent of infants) was 25 weeks of gestation and 600 g at birth. The birth weight-specific survival rates increased considerably over the three periods for infants <750 g at birth(period I: 10 percent, period II: 46.2 percent, period III : 70.6 percent). The survival rates of ELBWI over the three periods increased much remarkably after adjustment for clinical severity by CRIB II score. Conclusion : In our institution, survival rates of ELBWI during the last six years continued to improve, particularly for infants weighing <750 g at birth. This increase in survival rates was not associated with the clinical severity of ELBWI.
Keywords
Extremely low birth weight infant; Survival rate; CRIB II score;
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