The AUC of NA-IL6 as a stand-alone marker of BPD was 0.808 (95% CI 0.67 – 0.94); p = 0.002, with 24 pg/ml being the best cutoff with a sensitivity and specificity of 83.3%, false-positive rate of 26.7%, PPV of 66.7%, NPV of 92.6%, LR + of 5.00, and LR − of 0.20. Here, IL6 is linked to bronchopulmonary dysplasia.