Morbidity and mortality of very low birth weight infants in Taiwan—Changes in 15 years: A population based study

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BACKGROUND/PURPOSE: Very low birth weight (VLBW) infants account for over 50% of perinatal deaths in Taiwan. This study aimed to identify changes in parental characteristics, perinatal conditions, mortality, and major neonatal morbidities for VLBW infants in Taiwan, and to highlight the challenges faced by patients, families, and caregivers. METHODS: We conducted a retrospective cohort study to investigate the mortality and morbidity of VLBW infants registered in the Taiwan Premature Infant Follow-up Network from 1997 through 2011. The exclusion criteria included congenital anomalies and chromosome anomalies. Continuous data was represented as mean ± SD, and changes over time in the variables were tested using one-way analysis of variance, with p < 0.05 considered statistically significant. RESULTS: A total of 13,159 VLBW infants were enrolled. We found significant increases over time in the parental age and educational level, in vitro fertilization, first livebirth, multiple births, maternal transfer, cesarean section, and complete antenatal steroid use. Apgar scores at 1 minute and 5 minutes after birth increased, and the intubation rate decreased gradually. Decreasing mortality over time for each successive period was demonstrated. Incidence of some morbidities increased, such as respiratory distress syndrome and patent ductus arteriosus; in contrast, incidence of others decreased, such as sepsis, necrotizing enterocolitis, intraventricular hemorrhage, and chronic lung disease. However, retinopathy of prematurity (ROP) incidence remained constant. CONCLUSION: Although the mortality and most of the morbidity of VLBW infants improved over time, the incidence of ROP remained constant. This requires us to further evaluate our strategy for preventing ROP in the future.

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