Korean J Obstet Gynecol.  2010 Jan;53(1):29-34. 10.5468/kjog.2010.53.1.29.

Risk factors of preterm delivery and survival rate of preterm infants in Bucheon

• Kim TH
• Lee HH
• Chung SH
• Kim SS
• Hong YP

• KMID: 2077957
• DOI: http://doi.org/10.5468/kjog.2010.53.1.29

Abstract

OBJECTIVE
The aim was to compare risk factors of preterm delivery and survival rate in preterm infants.
METHODS
There were 723 preterm deliveries among 3,299 deliveries in our hospital from February, 2001 to December, 2006. We analyzed risk factors through women who give birth to preterm infants. The risk factors of preterm delivery were evaluated survival rate, very low-birth weight (VLBW) infant ratio, preterm infants to 751 preterm infants who was admitted at newborn intensive care unit. The data were retrospectively reviewed of hospital record and statistical analysis was performed using chi-square test and logistic regression test.
RESULTS
The incidence rate of preterm birth increased. The risk factors that preterm premature rupture of membranes (PROM) (P<0.001), pregnancy induced hypertension (PIH) (P<0.001), twin pregnancy (P<0.001), placenta previa (P=0.009) and placenta abruption (P=0.041) as women that give birth to preterm infants were statistically significant. But, anemia (P=0.170), previous cesarean section history (P=0.780), uterine myoma (P=0.848), previous appendectomy history (P=0.999) did not statistically significant. Survival rate of total preterm infants was average 95%. And survival rate of VLBW infants was 86%.
CONCLUSION
It was found to be risk factors for preterm delivery with PROM, PIH, and placenta previa. The VLBW infants with less than 33 gestational weeks are increased every year but total survival rate is not different. We hope that we propose to research the cause of preterm delivery and survival rate of preterm infants prospectively.

Keyword

Preterm delivery; Preterm infants; Very low birth weight; Survival rate; Risk factor; Morbidity

MeSH Terms

Anemia
Appendectomy
Cesarean Section
Female
Hospital Records
Humans
Hypertension, Pregnancy-Induced
Incidence
Infant
Infant, Newborn
Infant, Premature
Infant, Very Low Birth Weight
Intensive Care Units
Logistic Models
Membranes
Myoma
Parturition
Placenta
Placenta Previa
Pregnancy
Pregnancy, Twin
Premature Birth
Retrospective Studies
Risk Factors
Rupture
Survival Rate

Figure

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  Fig. 1 Survival rate by year in preterm infants.

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  Fig. 2 Composition by weight and gestational age by year in preterm infants.

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  Fig. 3 Survival rate of preterm infants per body weight.

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