Further ROC curve analysis found that the AUC of LH peak in diagnosing girls with precocious puberty was 0.973, which was higher than the 0.895, 0.875, and 0.912 of LH base value, FSH base value, and FSH peak value, respectively, suggesting that the LH peak value of the GnRH stimulation test has high diagnostic value in girls with precocious puberty. This evidence concerns the gene BRD2 and precocious puberty.