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Updated: May 20, 2026

Transcutaneous Microcirculatory Imaging in Preterm Neonates
Published on: December 31, 2015
Predictors of significant jaundice in late preterm infants
K Radha Lavanya1, Ashish Jaiswal, Pramod Reddy
1Fernandez Hospital, Hyderabad, Andhra Pradesh, India.
Insights
Late preterm infants have a high incidence of significant jaundice. Transcutaneous bilirubin (TcB) measurements at 24-48 hours are more effective predictors of later jaundice than clinical risk factors.
Area of Science:
- Neonatology
- Pediatric Gastroenterology
- Public Health
Background:
- Late preterm infants (34 0/7 to 36 6/7 weeks gestation) are at increased risk for significant jaundice.
- Early identification and management of neonatal jaundice are crucial to prevent complications.
Purpose of the Study:
- To determine the incidence and clinical course of jaundice in late preterm infants.
- To identify predictors of significant jaundice in this population.
Main Methods:
- A prospective analytical study was conducted at an urban perinatal center.
- Late preterm infants were monitored for jaundice until 14 days of life or onset of significant jaundice.
- Transcutaneous bilirubin (TcB) was measured twice daily for the first 48 hours; clinical risk factors were also recorded.
Main Results:
- Of 216 infants, 123 (57%) developed significant jaundice, defined by American Academy of Pediatrics (AAP) guidelines.
- Large for gestational age, lower gestational age, birth trauma, and history of sibling jaundice predicted severe jaundice.
- TcB measurements at 24-48 hours predicted jaundice onset after 48 hours more effectively than clinical factors.
Conclusions:
- Significant jaundice is common in late preterm infants.
- TcB measurements between 24-48 hours of life are superior to clinical risk factors for predicting later significant jaundice.
Objectives:
To study (i) the incidence and course of jaundice, and (ii) the predictors of significant jaundice in late preterm infants.
Design:
Prospective analytical study.
Setting:
Urban perinatal center.
Patients:
Inborn late preterm infants (post menstrual age of 34 0/7 to 36 6/7 weeks).
Methods:
Infants were followed till day 14 of life or till onset of significant jaundice. Relevant maternal, perinatal and neonatal variables were prospectively recorded. Transcutaneous bilirubin (TcB) was measured in each infant twice daily for the first 48 hours of life.
Outcomes:
Significant jaundice defined as requirement of phototherapy/exchange transfusion as per hour specific total serum bilirubin (TSB) nomogram of AAP guidelines.
Results:
216 infants were enrolled, of which 123 (57%) had significant jaundice. 36% of the jaundiced infants had TSB greater than 15 mg/dL. The mean duration of onset of significant jaundice was 61 ± 32 hours. The mean duration of phototherapy was 49 ± 26 hours. Large for gestation, lower gestational age, birth trauma and previous sibling with jaundice predicted severe jaundice. TcB measured at 24-48 hrs was a better predictor of significant jaundice with onset after 48 hrs than clinical risk factors.
Conclusion:
There is a high incidence of significant jaundice in late preterm infants. TcB measured at 24-48 hrs of life better predicts significant jaundice after 48 hours of life, in comparison with clinical risk factors.
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