PMID- 12497176 OWN - NLM STAT- Publisher LR - 20191120 IS - 1476-5608 (Electronic) IS - 1365-7852 (Linking) VI - 2 IP - 5/6 DP - 1999 Dec TI - Plasma steroid hormones, surgery for benign prostatic hyperplasia, and severe lower urinary tract symptoms. PG - 285-289 AB - Because benign prostatic hyperplasia (BPH) may be influenced by plasma steroid hormones, we examined their relation in the Health Professionals Follow-up Study. In 1993-1995, 18,000 cohort members provided blood. We selected as cases men who had had surgery for BPH (n=174) or who scored 20-35 points (n=126) on the American Urological Association index of severity of lower urinary tract symptoms. Cases were matched by age to men who scored