Table 1 Inclusion and exclusion criteria in this study
From: The association of serum vitamin D level and neonatal respiratory distress syndrome
Inclusion criteria | Exclusion criteria |
|---|---|
• Singleton • Birth gestational age 28-36 weeks • Admission to NICU within 24 hours after birth • Cord blood samples collected at birth • Informed consent obtained from parents • Clinical diagnosis of NRDS Medical records completeda | • Congenital and chromosomal anomalies • Severe liver and kidney dysfunction • Amniotic fluid aspiration syndrome • Presence of adenomatous malformation of lung, diaphragmatic hernia and genetic defects related to surfactant • Infants moved away during the study period • Mother’s therapy that could affect vitamin D level |