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Predictive values of plasma KL-6 in bronchopulmonary dysplasia in preterm infants
Dilek Dilli1, Ahmet Özyazici1, Arzu Dursun1
1Nurdan FETTAH, Ayşegül ZENCİROĞLU, Nurullah OKUMUŞDepartment of Neonatology, Dr Sami Ulus Maternity and Children Research and Training Hospital, Ankara, Turkey.
Background/Aim:
It has been suggested that plasma KL-6 increases in premature infants with bronchopulmonary dysplasia (BPD). We aimed to evaluate the predictive values of KL-6 in BPD.
Materials And Methods:
The study was performed in preterm neonates with birthweight ≤1500 g and gestational age ≤32 weeks. Plasma KL-6 levels were measured on postnatal days 1, 7, and 14.
Results:
BPD was identified in eight of the 28 study infants. On postnatal days 1 and 7, plasma KL-6 levels were similar in infants with BPD [on day 1: 8.9 (7.5-17.8) U/mL and on day 7: 16.8 (10.5-47.7) U/mL] and without BPD [on day 1: 10.8 (9.4-17.2) U/mL and on day 7: 12.9 (5.8-19.3) U/mL] (P = 0.38 and P = 0.13, respectively). On day 14, KL-6 levels were significantly higher in infants with BPD [155.2 (15.3-545.6) U/mL] than they were in infants without BPD [7.9 (7.7-15.6) U/mL] (P = 0.001). The best predictor was KL-6 levels on postnatal day 14 (area under the ROC curve = 0.88; range 0.75-1.0; P = 0.002). At this point, KL-6 level of 59.7 U/mL showed a specificity of 90.0% and negative predictive value of 85.7% for BPD.
Conclusion:
High plasma KL-6 levels on postnatal day 14 in premature infants may predict the development of BPD.