Abstract
Objective
This study aimed to find out the correlation between bilirubin levels and delivery methods in term babies with neonatal hyperbilirubinemia.
Methods
This retrospective study was performed in a single center. The subjects were full-term neo nates (37–41 weeks of gestational age) with a chief complaint of hyperbilirubinemia (serum total bilirubin ≥12 mg/dL) admitted to the Bundang Jesaeng General Hospital from May 2015 to July 2018. The subjects were divided into two groups according to delivery methods (vaginal delivery [VD] and cesarean section [CS]). Total bilirubin levels were compared between the two groups, and the correlation between severe hyperbilirubinemia (serum total bilirubin ≥25 mg/dL) and delivery methods was analyzed.
Results
A total of 87 neonates were enrolled. Of 87 neonates, 59 (67.8%) were born by VD and 28 (32.2%) by CS. The mean serum total bilirubin level of the VD group was significantly higher than that of the CS group (21.5±4.0 mg/dL and 17.5±3.4 mg/dL, respectively; P<0.001). There were also signi ficant differences in bilirubin levels according to delivery methods in subgroups based on demographic characteristics, except in cases when the age of neonates exceeded 7 days on admission and in breast-feeding neonates. In addition, VD was significantly correlated with an increased risk of severe hyperbilirubinemia (relative risk 1.5; 95% confidence interval 1.2–1.9; P=0.031).
Go to : 

References
1. Watchko JF. Hyperbilirubinemia and bilirubin toxicity in the late preterm infant. Clin Perinatol. 2006; 33:839–52.


2. Shapiro SM, Bhutani VK, Johnson L. Hyperbilirubinemia and kernicterus. Clin Perinatol. 2006; 33:387–410.


3. Tamouk A, Saleh Zadeh F, Amini Sani N, Moghadam Yeganeh ZH. Etiology of neonatal hyperbilirubinemia at Ardabil Sabalan Hospital, 2003. J Ardabil Univ Med Sci. 2005; 5:316–20.
4. Bhutani VK, Johnson LH. Urgent clinical need for accurate and precise bilirubin measurements in the United States to prevent kernicterus. Clin Chem. 2004; 50:477–80.


5. Bulbul A, Okan FF, Unsur EK, Nuhoglu A. Adverse events associated with exchange transfusion and etiology of severe hyperbilirubinemia in near-term and term newborns. Turk J Med Sci. 2011; 41:93–100.
6. Newman TB, Liljestrand P, Escobar GJ. Jaundice noted in the first 24 hours after birth in a managed care organization. Arch Pediatr Adolesc Med. 2002; 156:1244–50.


7. Newman TB, Xiong B, Gonzales VM, Escobar GJ. Prediction and prevention of extreme neonatal hyperbilirubinemia in a mature health maintenance organization. Arch Pediatr Adolesc Med. 2000; 154:1140–7.


8. Maisels MJ, Kring E. Length of stay, jaundice, and hospital readmission. Pediatrics. 1998; 101:995–8.


9. Chang PF, Lin YC, Liu K, Yeh SJ, Ni YH. Risk of hyperbilirubinemia in breastfed infants. J Pediatr. 2011; 159:561–5.


10. Davies DP, Gomersall R, Robertson R, Gray OP, Turnbull AC. Neonatal jaundice and maternal oxytocin infusion. Br Med J. 1973; 3:476–7.


11. Boskabadi H, Navaei M. Relationship between delivery type and jaundice severity among newborns referred to Ghaem Hospital within a 6-year period in Mashhad. Iran J Obstet Gynecol Infertil. 2011; 14:15–21.
13. Linn S, Schoenbaum SC, Monson RR, Rosner B, Stubblefield PG, Ryan KJ. Epidemiology of neonatal hyperbilirubinemia. Pediatrics. 1985; 75:770–4.


14. Yamauchi Y, Yamanouchi I. Difference in TcB readings between full term newborn infants born vaginally and by cesarean section. Acta Paediatr Scand. 1989; 78:824–8.


15. Bulbul A, Cayonu N, Sanli ME, Uslu S. Evaluation of risk factors for development of severe hyperbilirubinemia in term and near term infants in Turkey. Pak J Med Sci. 2014; 30:1113–8.


16. Chew WC, Swann IL. Influence of simultaneous low amniotomy and oxytocin infusion and other maternal factors on neonatal jaundice: a prospective study. Br Med J. 1977; 1:72–3.


17. Calder AA, Ounsted MK, Moar VA, Turnbull AC. Increased bilirubin levels in neonates after induction of labour by intravenous prostaglandin E2 or oxytocin. Lancet. 1974; 2:1339–42.


18. Keren R, Bhutani VK, Luan X, Nihtianova S, Cnaan A, Schwartz JS. Identifying newborns at risk of significant hyperbilirubinaemia: a comparison of two recommended approaches. Arch Dis Child. 2005; 90:415–21.


19. Buchan PC. Pathogenesis of neonatal hyperbilirubinaemia after induction of labour with oxytocin. Br Med J. 1979; 2:1255–7.


20. Koh BH, Lee DK, Hwang HB, Kim SD, Ahn JY. Obstetric factors influencing the incidence rate of neonatal hyperbilirubinemia. Obstet Gynecol Sci. 1984; 27:2151–6.
21. Lee HS, Kwon GH, Kim JD. Clinical study on the oxytocin effect on neonate. Obstet Gynecol Sci. 1986; 29:942–9.
22. Jang HH, Kim YH, Ha YS, Park JS. Obstetric factors influencing the incidence rate of neonatal hyperbilirubinemia. Obstet Gynecol Sci. 1987; 30:506–13.
23. Jeong YA, Chung CW. Pregnant women's labor progress, childbirth outcome, and childbirth satisfaction according to the presence or absence of labor induction. Korean J Women Health Nurs. 2018; 24:58–70.


25. Carbonell X, Botet F, Figueras J, Riu-Godó A. Prediction of hyperbilirubinaemia in the healthy term newborn. Acta Paediatr. 2001; 90:166–70.


27. Farhat AS, Hafizi L, Pourhoseini MT, Halimi F, Mohamadzadeh A, Saeidi R. Comparison of bilirubin level in term infants born by vaginal delivery and C/S. IJN. 2016; 7:45–9.
28. Alkan S, Tiraş U, Dallar Y, Sunay D. Effect of anaesthetic agents administered to the mothers on transcutaneous bilirubin levels in the neonates. Acta Paediatr. 2010; 99:993–6.


29. Saber A, Ferdowsi S, Askari F, Farsi L. Epidemiology of pathological jaundice and its association with demographic factors in infants born in the 22 Bahman Hospital in Gonabad, 2011. Razi J Med Sci. 2013; 20:42–8.
30. Boskabadi H, Zakerihamidi M, Bagheri F. Outcomes of vaginal delivery and cesarean in Mashhad Ghaem University Hospital. Tehran Univ Med J. 2014; 71:807–15.
31. Agrawal V, Singh V, Goel SP, Gupta B. Maternal and neonatal factors affecting physiological jaundice in Western U.P. Indian J Physiol Pharmacol. 2007; 51:203–6.
32. Gale R, Seidman DS, Dollberg S, Stevenson DK. Epidemiology of neonatal jaundice in the Jerusalem population. J Pediatr Gastroenterol Nutr. 1990; 10:82–6.


33. Maisels MJ, Newman TB. Kernicterus in otherwise healthy, breastfed term newborns. Pediatrics. 1995; 96(4 Pt 1):730–3.


34. Huang A, Tai BC, Wong LY, Lee J, Yong EL. Differential risk for early breastfeeding jaundice in a multiethnic Asian cohort. Ann Acad Med Singapore. 2009; 38:217–24.
Go to : 

Table 1.
Clinical Characteristics of Patients with Neonatal Hyperbilirubinemia (n=87)
Table 2.
Comparison of the Mean Serum Total Bilirubin Levels according to Delivery Methods (by Independent Samples t-test)
Total bilirubin level (mg/dL) | P-value | |
---|---|---|
Vaginal delivery | 21.5±4.0 | <0.001 |
Cesarean section | 17.5±3.4 |
Table 3.
Comparison of the Mean Serum Total Bilirubin Levels according to Delivery Methods in Subgroups based on Demographic Characteristics of Neonates (by Independent Samples t-test or Mann-Whitney U-test)
Table 4.
Comparison of the Mean Serum Total Bilirubin Levels according to Characteristics of Neonates
Table 5.
Comparison of the Mean Serum Total Bilirubin Levels according to Feeding Types (by Post-hoc Analysis)
Table 6.
The Correlation between Severe Hyperbilirubinemia (Total Bilirubin ≥25 mg/dL) and Delivery Methods (by Fisher's exact test; Relative Risk 1.5; 95% Confidence Interval 1.2–1.9; P=0.031)