In the non-BPD group, serum MED1 was positively correlated with serum PGC-1 α levels on the 1st, 7th, and 28th days of life and PMA 36 weeks, with correlation coefficient R-values of 0.849, 0.509, 0.403, and 0.464 (P < 0.05) (Table 2C), respectively. This evidence concerns the gene MED1 and bronchopulmonary dysplasia.