Non-obstructive lower urinary tract symptoms versus prostate volume in benign prostatic hyperplasia.

This study was aimed to determine the relation between sonographically measured prostate volume and the severity of non-obstructive Lower Urinary Tract Symptoms (LUTS) in Benign Prostatic Hyperplasia (BPH). This was an analytic-descriptive, cross-sectional and prospective study which was carried out on a sequential sample of 60 male patients since 2006 to 2008. The patients were divided to three groups (prostate volume < 40 cc; 40 cc < or = prostate volume < or = 59 cc; prostate volume > or = 60 cc) based on the ultrasonographic volume of the prostate. The American Urological Association scores of frequency, urgency, nocturia and dysuria were compared between three groups. The mean age and the mean total score of non-obstructive symptoms of BPH of the patients were 71.18 +/- 8.74 and 13.38 +/- 2.96, respectively. According to our findings there was no statistical significant difference between three groups in the scores of frequency (p = 0.369), dysuria (p = 0.85) and nocturia (p = 0.861). A statistically significant difference between three groups was found in urgency score (p = 0.037). Only a significant correlation between urgency and the prostate volume was found (p = 0.024, r = 0.291). According to our findings in this work on relation between the non-obstructive symptoms and prostate volume in BPH patients we found that urgency was the only non-obstructive symptom that may be associated with prostate volume. Prospective studies are required in this regard to elucidate the symptom-related causes of LUTS in the patients with BPH.