IGF1 and benign prostatic hyperplasia: Negative correlations were found between the IGF‐1 concentration and PGV considering all dogs (r = −0.33, p < 0.05), the RR CPSEn with clinical signs of BPH (r = −0.89, p < 0.01) and the entire group of RR with clinical signs of BPH (r = −0.47, p = 0.05) (Table 1).