MED1 and bronchopulmonary dysplasia: In addition, in the BPD group, serum MED1 was positively correlated with serum PGC-1 α levels on the 1st, 7th, and 14th days of life, with correlation coefficient R-values of 0.865, 0.916, and 0.829(P < 0.05) (Table 2B), respectively.